To easily locate events in the current view, type a search term in the Filter and Search field in the top right corner of the tab. Events will be filtered out as you type. All events that don’t match the search term will be dimmed, leaving the spotlight to events you’re looking for.
Search events
To search for all events matching the search criteria:
Type a search term in the Filter and Search field in the top right corner of the tab;
Press Enter to see the first 10 results or click Search to get a full list of all events;
Click on the event to see it in the calendar view you had open before searching.
(Double-)click on a free area in the calendar view.
Enter the title, time and other information.
Click Done or press Enter to save the event.
To edit an event:
Click on it to open the event editor.
Make the changes.
Click Done or press Enter to save the event.
To delete an event:
Click on the event to open the event editor and click Delete.
Right-click on the event and select Delete Event.
Navigate to the event using your keyboard and press Delete, when the event is highlighted.
Tip! Use arrow keys on your keyboard to navigate between timeslots, days and events. Press Enter to add or edit an event, Tab and Shift+Tab to move between event information fields and Enter again to save changes or Esc to cancel.
Navigate between time periods
To go to the next and previous date ranges:
Click on the arrow buttons in the top right of the panel.
Use arrow keys to move between the timeslots and continue pressing the same key to jump to next date range. For example, press the right key to go to the next day or keep pressing the down arrow to go to the next date range in week view.
In addition, you can jump between dates and get a look at the full month’s calendar using the mini calendar at the bottom of the panel. To change the size of the month view:
Place your mouse cursor on the top edge of the mini calendar.
Click and drag upwards to make the calendar bigger and downwards to make it smaller or hide it altogether. By double-clicking on the edge, you can toggle the visibility of the mini calendar without resizing it.
To focus on today, click on the Today button.
To go further back or forward in time:
Click on the currently shown time period on top of the panel.
Use the arrows on both sides of Today to move to the previous or next period.
Click on Calendars in the top left corner of the tab to see a list of all calendars.
Click on the calendar name to show or hide them. If the circle with the calendar’s colour in front of the calendar’s name has a check mark in it, the calendar’s events are visible. If the circle is empty, the events are hidden.
Default calendar
To set a default calendar:
Click on Calendars > Default Calendar in the top left corner of the calendar view.
Select a new default calendar from the list of available calendars.
When you change the calendar for an event in the event editor, that calendar will become the default calendar.
Calendar views
In Vivaldi Calendar you can see events in the following views:
Day (d) – one day divided into hour long timeslots. Adjust visible hours in Settings > Calendar > Calendar Settings > Day Settings.
Week (w) – one week divided into hour long timeslots.
Multiweek (n) – 3 weeks (such as previous, current and next week) not limited to the same month.
Month (m) – one calendar month.
Year (y) – full calendar year, accompanied by a day view on the side.
Agenda (a) – 6 weeks worth of events in a list grouped by dates.
In Multiweek and Months views you have the option to toggle the visibility of Day View Sidebar, from the Calendar view navigation bar in the top right corner of the Calendar tab.
Switch between views
To switch between different Calendar views:
Click on the options in the calendar view navigation bar in the top right corner of the tab.
Use single key shortcuts to switch between views. For example, press M for month view. You can see all the shortcuts in the list above or by hovering over the Calendar view navigation bar in the top right corner of the Calendar tab. To enable single key shortcuts, go to Settings > Keyboard > Keyboard Shortcuts > Single Key Shortcuts.
Navigate between time periods
To go to the next and previous date ranges:
Click on the arrow buttons next to the Today button in the top left corner.
Use arrow keys to move between the timeslots and continue pressing the same key to jump to next date range. For example, keep pressing the right key to go to the next day/week in the Day and Week view or keep pressing the down arrow to go to the next date range in Multiweek and Month view.
Use your mouse’s scroll wheel to focus on the previous or next date range.
To focus on today, click on the Today button on the Calendar view navigation bar.
To go further back or forward in time:
Click on the currently shown time period in the top center of the page or on top of the Calendar Panel.
Use the arrows on both sides of Today to move to the previous or next period.
Click on the date (range) to open it.
Whether you see an overview of a single month or list of months depends on the current Calendar view.
Day, week, multiweek and agenda view
Month and year view
Event layouts
There are 3 different event layout options available in Vivaldi Calendar:
Full – Shows the event time, title, description, location and link of the event.
Compact – Shows the same as above, but if the description or link info are too long only limited amount of that info will be displayed.
Minimal – Only event time and title are shown.
To switch between these views, click on the layout buttons in the top right corner of the Calendar tab, next to the Filter and Search field. Alternatively, change the view in Settings > Calendar > Calendar Settings > Events Layout.
Calendar spacing
In Vivaldi, the time slots in the calendar don’t have fixed widths and heights and longer events don’t necessarily take up more space. Instead the time slots adjust according to the amount of information you have about the event. Meaning, an event with a long title and description lasting only for an hour can take up more space than a 5 hour long event with a short title and description.
In Settings > Calendar you can manage your Calendar accounts and their calendars. In addition, you can adjust various settings for the Calendar interface and for managing events.
Calendar display
Show event property icons
By enabling the option Show Icons for Event Properties you can see whether the event information includes a link and a location, whether it’s a recurring event and if it’s a task or not.
Show week number
In Settings > Calendar > Calendar Display you can toggle the visibility of week numbers.
In Day, Week, Multiweek, Month and Agenda view week numbers will be shown on top of the page, next to the currently shown date range. In Month and Year view, week numbers are shown in front of the week rows.
To decide which day the week starts with, go to Settings > General > Language > Preferred Date & Time Format.
Event views
There are 3 different view options available in the Vivaldi Calendar. They can be changed from Settings > Calendar > Calendar Display > Events View or from the top right corner of the Calendar tab.
Full – Shows the event time, title, description, location and link of the event.
Compact – Shows the same as above, but if the description or link info are too long only limited amount of that info will be displayed.
Minimal – Only event time and title are shown.
Day settings
For day and week view you can adjust the core hours of your day to fit your routine. Set the day’s start time and and end time in Settings > Calendar > Calendar Display > Day Settings. In addition, you can decide whether to show the time slots outside your core hours in the Calendar or not by enabling or disabling Collapse out of Day Hours.
Time increments
In Day and Week view you can divide each time slot into smaller increments. You can choose between 15 minutes, 30 minutes and 1 hour in Settings > Calendar > Calendar Display > Time Increments.
You can also choose, whether you want the dividing lines between these smaller timeslots to be visible (like on the screenshot below) or not by toggling on or off the setting for Show only 1 Hour Grid Lines.
Furthermore, when navigating the calendar with your keyboard, you can decide, whether you’ll focus on each 15 or 30 minute time slot (like on the screenshot above) or just on the full hour. Toggle the setting Use 1 Hour Increments for Keyboard Navigation on or off according to your preference.
Default action for clicking on time slots
When navigating the calendar a single click on a time slot can either focus on the selected period or open the event editor. You can choose which you prefer in Settings > Calendar > Calendar Display > Click on Time Slot Should. When you’ve chosen to select a period, then to start creating a new event, double click on the time slot.
Default action for clicking outside the event
Normally, you’d click Done or Cancel/Delete when you’re finished with editing an event, but you can also just click outside the event editor. You can decide what happens when you do that in Settings > Calendar > Calendar Display > Click Outside Event Should. You can either discard the changes you were making or you can save them.
Calendar editing
Edit mode
In Vivaldi Calendar you can create and edit events either inline, meaning in the calendar view itself, or in a popup dialog. Choose the one you prefer in Settings > Calendar > Calendar Settings > Edit mode.
Inline event editorPopup event editor
Default event duration
If most of your events are the same length, it can save you a few clicks when you set the default event length to match it. Go to Settings > Calendar > Calendar Editing > Default Event Duration to choose the a length between no duration (event start and end time are the same) to 8 hours.
Default event reminder
To automatically set a reminder for all events at your chosen time, go to Settings > Calendar > Calendar Editing > Default Event Reminder and choose, how many minutes, hours or days before the event’s start time do you want to get a reminder. By default, reminders are turned off. Regardless of your default setting, you can change the reminder time per event when creating a new event or editing an existing one.
Auto Adjust event’s end time
When changing the start time of an event, by default, the end time changes as well, to keep the event’s duration the same. In Settings > Calendar > Calendar Editing > Auto Adjust End Time you can change it to Never, if you prefer to keep the event’s end time the same even when you change the start time. You can also choose to change the end time for all events, expect all day events.
Auto Focus Next Date/Time
When editing the start and end time of an event by typing, as soon as you finish entering the full date/time, the next date/time will be focused. If you don’t like that behaviour, you can disable this setting in Settings > Calendar > Calendar Editing > Auto Focus Next Date/Time. That way, you can type the date in one go, e.g. 04-05-2022, but you’ll manually have to move focus to the time field, e.g. 09:00.
Calendar notifications
You can set notifications for the events in your calendar, used mostly for event reminders.
Notification style
In Settings > Calendar > Calendar Notifications > Notification Style you can decide how the notification is displayed. You can choose between:
System notification.
A popup dialog in the browser.
A melting browser effect followed by a popup dialog.
A burning browser effect followed by a popup dialog.
Notification sound
Notifications can be accompanied by a sound. You can choose between 3 different sounds (Ding, Rooster, Tada) or have sounds disabled.
Calendar integration
Calendar mail account
To share events, the Calendar needs to be linked to a mail account. Select the mail account in Settings > Calendar > Calendar Integration > Calendar Mail Account.
When you add participants’ email addresses to the event, then right after saving the event you can send an invitation email to the participants. From Settings > Calendar > Calendar Integration > Send Invite Email Message you can choose whether to:
ask you each time,
always send messages, or
never send messages.
If you choose to send a message, you can add a note to the email.
ICS files
If you have downloaded or someone has shared with you a calendar file with an .ics extension, you can easily add it to your Vivaldi Calendar. Just enable Open ICS files in Vivaldi in Settings > Calendar > Calendar Integration for Vivaldi to take the proper actions.
Disable Vivaldi Calendar
In case you’re not planning to use neither Vivaldi Mail, Calendar nor Feeds, you can disable the features from Settings > General > Productivity Features > untick “Enable Mail, Calendar and Feeds”.
Open the event editor in one of the following ways:
In the main Calendar view, click on New Event in the top left corner of the tab.
In the main Calendar view or in the Calendar Panel, click anywhere in the calendar, for example, on the time slot when the event is happening. If you’re using your keyboard to navigate in the Calendar, press Enter.
In the main Calendar view or in the Calendar Panel, click and drag to set the event’s time and length first. After releasing the mouse button the event editor will open.
Highlight some text on a web page and select Add as Calendar Event from the right-click context menu.
Right-click on a message in the Mail list or on the open message itself, select Add to Calendar, and whether to add the message as an event, task, or invite.
In the event editor you can add the following information to events:
Title, description and notes about the event.
Start and end time and options to convert the event into an all day event and change time zone for the event.
Option to convert the event into a task.
Location of the event.
Make the event recur at chosen intervals.
Link to additional information about the event.
Set browser alarms to notify you about the event at the event time and/or before.
Invite participants to the event. Invitations are sent via email and for that you need to have set up a mail account in the mail client.
Change, to which calendar the event belongs to.
When you’re finished filling in the information about the event, click Done or press Enter.
Edit mode
In Settings > Calendar > Calendar Display > Edit mode you can select whether you want to edit events inside the calendar view (inline) with event information divided into tabs, but all surrounding events visible or in a popup dialog with all information about the new event visible simultaneously, but surrounding events hidden by the popup dialog.
Click on Delete Template below the list of existing templates.
Share an event
First, make sure you’ve set a mail account for Calendar in Settings > Calendar > Calendar Integration > Calendar Mail Account, which will be used to send event invitation emails.
To invite participants to an event, in the event editor:
Add the invitees’ email addresses to Participants.
Click Done or press Enter to save the event.
Choose whether you want to send the participants an email about the event. It’s also possible to include a message to the email.
If you choose to send a message to the participants, the invitee will then get an email, where they can accept or decline the invitation.
If they choose to share their attendance status with you, you’ll get a reply email. In the email message, click on Update Event in Calendar to update the participant’s status.
In Settings > Calendar > Calendar integration > Send Invite Email Message, you can choose whether to:
Always send a message to participants.
Never send a message to participants.
Or ask you every time.
Open links from events
Web links in the description or URL field of the event are visible in Compact and Full displays, where more than a title of the event is shown. Learn more about event layout options here. The links will open in a new tab.
When you’re editing the event, you need to copy the URL to the Address field.
Delete an event
To delete an event:
Open the event and click Delete at the bottom of the event editor;
Right-click on an event and select Delete event.
Navigate to the event using your keyboard’s arrow keys, press Delete.
To permanently delete trashed events:
Open the main Calendar view.
Click on Trashed Events in the top right corner of the tab.
Click Clear All at the end of the list.
Restore a deleted event
If you accidentally deleted an event or just want to restore a recently deleted event:
Open the main Calendar view.
Click on Trashed Events in the top right corner of the tab.
Click on the event you want to restore.
To restore the most recently deleted event, right-click on any of the timeslots in the Calendar and select Restore Event From Trash.
To use Vivaldi Calendar, make sure you’ve enabled Mail, Calendar and Feeds from Settings > General > Productivity Features. On a brand new installation or in a new User Profile, choose the “Browser, Mail, and Calendar” option in the welcome flow.
Local account
Vivaldi Calendar comes with a local account already set up. Calendars and events under the local account are stored on the computer and can only be viewed and managed in the browser instance they were created in.
This option is good from a privacy viewpoint as events won’t be stored on third-party servers, but inconvenient, if you’d like to access and manage your events from multiple locations and share with others.
Online accounts
You can also use Vivaldi Calendar with online accounts, in which case calendars and events are stored on the calendar service provider’s servers and can be accessed from multiple clients.
Fill in the rest of the information (read below for further instructions for each account type);
Click Create account.
Vivaldi.net
Vivaldi webmail comes with an online calendar feature. You can add the CalDAV calendar easily to the browser because the browser detects the calendar link automatically on login.
After you’ve selected Vivaldi.net as the account type:
Give the Calendar account a name.
Type in your Vivaldi account’s email address (all lowercase letters) and password.
Click Add Account.
Select the calendars you want to sync with Vivaldi Calendar, which ones to hide, and which one is the account’s default calendar.
Click Done or Add Another Account if you have more accounts to add.
Google Calendar
After you’ve selected Google Calendar as the account type:
Give the Calendar account a name.
Type in your Gmail address.
Click Add Account.
Follow the login instructions in Google’s pop-up login window that opens. Log in and give Vivaldi viewing and editing access to your calendars.
Select the calendars you want to sync with Vivaldi Calendar, which ones to hide, and which one is the account’s default calendar.
Click Done or Add Another Account if you have more accounts to add.
Note! By default, Google Calendar will add a notification to all new events which have no notifications. If you experience unexpected reminders on events created in the Vivaldi Calendar, please check the settings on the Google Calendar site. It is not enough to turn off the global notification setting, so check each calendar’s settings separately.
iCloud calendar
Before adding your iCloud account to Vivaldi Calendar, create an app-specific password to use in Vivaldi Calendar (instructions).
After you’ve selected Apple iCloud as the account type when adding a new account:
Give the Calendar account a name.
Type in your Apple ID.
Enter the app-specific password you created for Vivaldi.
Click Add Account.
Select the calendars you want to sync with Vivaldi Calendar, which ones to hide, and which one is the account’s default calendar.
Click Done or Add Another Account if you have more accounts to add.
CalDAV
After you’ve selected CalDAV as the account type:
Give the Calendar account a name.
Enter the account’s address, which you should find somewhere in the calendar account’s settings in the service’s web view.
Type in the username and password.
Click Add Account.
Select the calendars you want to sync with Vivaldi Calendar, which ones to hide, and which one is the account’s default calendar.
Click Done or Add Another Account if you have more accounts to add.
Web Calendar
Web calendars, for example, local public holidays or your favorite sports team’s match calendar, are a good way to follow events that you don’t want to add manually yourself, but would still like to know about. Web calendar events are read-only, meaning you can view them, but only the calendar owner can edit the events.
After you’ve selected Web Calendar as the account type:
Give the Calendar account a name.
Enter the calendar’s link (make sure the URL ends with .ics).
Click Add Account.
Select the calendars you want to sync with Vivaldi Calendar, which one’s to hide and which one is the account’s default calendar.
If the web calendar has limited access, enter your username and password. In case it’s a public calendar leave the username and password fields empty.
Click Done or Add Another Account if you have more accounts to add.
Calendar Mail Account
To share events, the Calendar needs to be linked to a mail account. Select the mail account in Settings > Calendar > Calendar Settings > Calendar Mail Account.
Feeds are a good way to consume frequently updated web content in a simple format from a single location, the feed reader. The types of content published via newsfeeds include news, blogs, podcasts, forum discussions and more. Depending on the website, you may see the full content in the feed reader or only a snippet with a link to the full version. Subscribing to feeds saves you time from checking each website you like to follow manually. In Vivaldi browser, the feed reader is part of the email client and supports RSS and Atom newsfeed formats as well as DC (Dublin Core) extensions to RSS and Atom.
Enable Feeds
To use Feeds, make sure you’ve enabled Mail, Calendar, and Feeds or just Feeds from Settings > General > Productivity Features or in Settings > Feeds. On a brand new installation or in a new User Profile, choose the “Enable Mail, Calendar and Feeds” option in the welcome flow.
Subscribe to Feeds
From a website
Address Bar
When Vivaldi detects that the website offers feeds, you’ll see the Feeds button on the right side of the Address field. To add the feed to Vivaldi:
Click on the Page offers feeds button on the Address Bar.
Click on the name of the feed.
Preview the feed’s posts.
Click on Follow Feed.
Review the feed’s title and refresh interval.
Click Add Feed.
Some sites offer both RSS and Atom feeds. Select the option you prefer.
In case you don’t see the icon on the Address Bar, but you’re sure the site offers feeds, go to Settings > Feeds > Feed Detection and make sure Detect Feeds in Web Pages is enabled.
Feeds link on the page
Most websites that offer feeds have a subscription link somewhere on their website.
Insert the Feed Title, URL and select how often Vivaldi should check for new posts.
Tip!
You can add multiple feeds at once by pasting feed URLs one after another in the Address field. Leave the Title field empty so the title from the feed can be used (otherwise all feeds will have identical titles).
In Settings > Feeds, you can also decide whether you want to see a notification, when there’s a new feed post.
Subscribing to YouTube feeds
Subscribing to YouTube feeds with Vivaldi Feed Reader is a good way to follow your favorite content creators without a Google account or even visiting YouTube’s website.
YouTube feeds contain details of the video, which Vivaldi extracts and embeds in the feed body. YouTube videos supplied in this way are embedded using YouTube’s ‘nocookie’ option, which means that YouTube should not set any tracking cookies unless you actually choose to play the video.Vivaldi can also detect and embed YouTube videos in feeds from other websites, if they choose to supply details of a YouTube video in the same way. This may allow the YouTube website to see that you are viewing a feed from another website, and you may choose to disable it for privacy reasons. You can do it in Settings > Feeds > Attachments > disable Embed YouTube Links in Attachments. When disabled, Vivaldi can use the normal feed links to link to the video instead.
Select the feed you want to check. The list of posts opens in a new tab;
Click on the post title to view the content.
You can add Flags and Labels to feed messages the same way you’d add them to email messages. Either:
from the message menu above the post;
by selecting the flag or label option from the right-click context menu in the post list.
To delete a post from a feed, either:
Open the post and click on Move to Trash from the message toolbar;
Right-click on the post in the posts list and select Move to Trash.
To restore a deleted post:
Open the Feed Panel.
Click on the Trash folder below the list of your feeds.
Right-click on the deleted post you want to restore and select Undelete from the context menu. Alternatively, while you have the post open, Undelete on the menu above the post.
You can edit the Title, Address, and update frequency.
In case you don’t want to receive any new feed messages, but don’t want to delete the feed either, select Never in the Refresh Interval drop-down menu in Newsfeed Account settings, which will keep the old messages, but won’t download new ones.
Rename feeds in the Panel
To quickly rename a feed:
Find the feed in the Feeds or Mail Panel;
Right-click on the feed;
Select Rename;
Update the name;
Press Enter.
Create folders for feeds
You can group feeds by dividing them into folders.
To add a new Feeds folder:
Open the Feeds Panel.
Near the top, click on the New Folder button. Alternatively, right-click on an existing feed or feed folder and select New Folder from the context menu.
Give the new folder a name.
Click Add Folder.
To move feeds to folders:
Open the Feeds Panel.
Click and drag the feed you want to move.
Hover over the folder you want to move the feed to.
Release the mouse button.
To rename a folder:
Right-click on the folder in the Feeds Panel.
Select Rename.
Give the folder a new name.
Press Enter.
To delete a feeds folder:
Right-click on the folder in the Feeds Panel.
Select Delete Feed Folder.
Click Delete Feed Folder in the confirmation dialog.
Please note that deleting a feeds folder will not unsubscribe you from and delete the feeds in the folder. They’ll be moved to the main list.
Share feed messages
To easily share interesting feed messages with others via email:
Open the message;
Click on Forward in the message menu above the post;
Enter the recipient’s email and, if you wish, add a message;
Click Send.
If the feed owner has provided the necessary details, you can also send a message to the feed authors by replying to the feed message as if it were an email message.
Delete Feeds
To remove a feed and its posts from the email client:
Vivaldi Feeds Reader supports import of any RSS, Atom, or unlabelled feed types from an OPML file, which makes it possible for you to export your feeds from your current feed reader to Vivaldi. The following instructions are based on Thunderbird, which means the first 3 steps may differ, if you use a different feed reader, but the rest are the same.
Import feeds from Thunderbird
In Thunderbird, go to the feeds group and right click on it;
Select Subscribe;
In a popup window click on the Export button;
Save the file on your computer. It is then saved as an OPML file (feeds.opml for example);
In Vivaldi, go to the Vivaldi menu > File > Import from Applications or Files.
From the dialog’s drop down menu select Import Feeds (OPML file).
Click Choose a File and find the OPML file.
Review the feeds’ names, links and update frequency.
Click Add Feeds.
Import feeds from a website
In case someone has shared the set of feeds they follow on their website and they serve it as an OPML file, you can add those feeds to Vivaldi in just a few steps. To do that:
Go to the website that serves the OPML file and open it.
A page with all the feeds listed and an option to select all or some of them will open. Make your selection.
Click Subscribe to selected feeds.
Review the feeds’ names, links and update frequency.
Click Add Feeds.
Export feeds from Vivaldi
In addition to importing feeds from other feed readers, you can also export the feeds you follow in Vivaldi as an OPML file.
To export feeds:
Go to the Vivaldi menu > File > Export > Export Feeds.
In All Messages you see emails from all your mail accounts in one central location.
Unread – All unseen and unread messages;
Received – All messages, regardless of the read status;
Sent – All messages you’ve sent from any of your accounts;
Drafts – All messages you have started composing, but haven’t sent or moved to the Outbox for sending;
Outbox – Messages that you’ve finished writing and are ready to send;
Spam – Junk mail. A good place to check when you’re expecting an email, but can’t see it in inbox folders.
Trash – Deleted messages from all accounts.
Custom Folders
Custom folders are mail folders you’ve created on the server under the Inbox folder.
Mailing Lists
Messages sent to a mailing list you’re subscribed to will be grouped and listed in the Mailing Lists folder. Read more here.
Filters
By creating filter rules, you can automatically organize incoming messages. Read more here.
Flags
Flags can be assigned to messages for easier tracking and follow-up. Read more here.
Labels
You can add labels to all messages in all folders in all accounts as another way to group them together. Read more here.
Feeds
Feeds allow you to access updates from various websites from a single location. Feeds are commonly used for blogs, news feeds, and other content posted in episodes at regular intervals. Read more here.
All Accounts
All your mail accounts with their Inbox, Sent and custom folders are listed in the All Accounts section.
To change the order in which your accounts appear in the Mail Panel:
Place the mouse cursor on the outer edge of the panel
Drag the panel wider or narrower.
To give the panel a separate width from other panels, first right-click on the Mail Panel button and select Separate width, then resize the panel as instructed above.
Mail Panel order and visibility
To toggle the visibility of the folders in the Mail Panel:
Go to Settings > Mail > Mail Settings > Mail Panel Order and Visibility.
Click on the check boxes to show/hide the folder.
To reorder folders in the Mail Panel:
Go to Settings > Mail > Mail Settings > Mail Panel Order and Visibility.
Select the folder you want to move.
Click on the arrows at the bottom of the list to move the folder up or down in the list of folders. Alternatively, click and drag the folder to its new location.
Using Flags is a good way to highlight important messages and make them easy to spot in your mailbox. In Vivaldi Mail you can pick between 7 flag colours – red, orange, yellow, green, blue, purple and grey. You decide what each colour stands for.
Add a Flag to a message
To add the default red flag to a message:
Open the message and click on Flag on the message toolbar;
Right-click on the message in the message list and select Add Flag.
To add a different color flag to a message:
Open the message, click on the arrow next to the Flag button and select the flag color;
Right-click on the message in the message list and select Flags > flag color.
The flag will be shown in front of the subject in the message list and after the subject in the opened message. Each message can have only one flag.
To add flags to multiple messages at once:
Hold down the Shift or Ctrl/Cmd key while clicking on the messages you want to add a flag to;
Right-click on one of the selected messages and select Add Flag or Flags > flag color.
Click on the Flags root folder title to see all flagged messages or click on a specific color to see only messages with that flag color.
Remove a Flag
To remove a flag from a message:
Open the message and click on Flag on the message toolbar;
Right-click on the message in the message list and select Remove Flag.
Syncing flags
Flags are synced with other mail clients that also support flags. If the other client has multiple flag colours, like Apple Mail, the different flag colours will be synced. If the client supports only one flag colour (commonly red) or stars, all flags, despite the colour in Vivaldi, will be in a single colour in the other client. When you’ve added a flag or a star to a message in another mail client, it will get a red flag in Vivaldi.
Calendar button on the 
Vivaldi menu > View > Calendar Panel.
New Event in the top left corner of the tab.
Title, description and notes about the event.
Start and end time and options to convert the event into an all day event and change time zone for the event.
Option to convert the event into a task.
Location of the event.
Make the event recur at chosen intervals.
Link to additional information about the event.
Set browser alarms to notify you about the event at the event time and/or before.
Invite participants to the event.
Add Template below the list of existing templates.
Delete Template below the list of existing templates.
Trashed Events in the top right corner of the tab.
Add account below the list of accounts;
Delete Account below the list of accounts
Feeds button on the right side of the 
Move to Trash from the message toolbar;
Undelete on the menu above the post.
New Folder button. Alternatively, right-click on an existing feed or feed folder and select New Folder from the context menu.
Forward in the message menu above the post;
Delete Feed below the list of feeds;
Flag on the message toolbar;
