When watching a card, you’ll get notifications for…
All comments from other users
Adding, changing, and upcoming due dates
Card moves and archives
Attachments uploaded to a card
When watching a list or board…
You’ll get the same notifications listed above, but for all cards in a list or board.
You’ll also get notifications for all newly created cards
And at any time, you’ll get notifications when…
You are mentioned in a comment.
You are added to a card, board, or Workspace.
You are mentioned in a checklist item.
One of your boards is closed.
When someone makes you an admin of a board or Workspace.
The notifications panel
Notifications are represented on the Trello site with a bell-shaped button in the top right corner. When you have new notifications the button turns red. Click on the notifications button to view your notifications. You'll see the notifications grouped by card.
Also, by default, you will receive a notification email for any notifications that go unread within Trello.
The red bell icon means you have new notifications.
Marking notifications as read
After clicking on the bell icon, you'll see all unread notifications. You can individually mark them as read or mark all as read at once via the 'Mark all as read' link in the top right corner. To view all your notifications, including notifications that have been marked as read already, click on 'View all' in the top left.
Due date notifications
If you set a due date on a card and you are a member of the card (or watching the card), you will receive a notification about the card twenty-four hours before it is due by default. You can set a custom reminder time when setting the due date:
Notification emails and preferences
You can change how often you get notification emails on your Account settings page. You can also set your notification email preferences by clicking the notifications button in the header and selecting "Change notification email frequency". Options are "Never", "Periodically", and "Instantly." "Periodically" is the default, and any unread notifications in Trello are emailed out as soon as possible.
Set how often you want to receive email notifications from Trello.
Emails contain a collection of all unread notifications. Email summaries won't include any notifications you've already read on the site. You can reply to individual notifications from within a notification email to add a new comment to the card that is referenced in each notification.
If you’re using Chrome, Safari or Firefox, your browser can generate desktop notifications, an emerging web standard. (At this time, Trello must be open in a browser tab to get desktop notifications.) Just click on your name in the header, and select "Settings" then select “Enable desktop notifications…” from the settings page. Now when you get a notification, a small window with the notification will show up in the corner of your desktop. Desktop notifications can also be set in your " Account" page.
If you would like to disable Trello desktop notifications in Chrome & Firefox, while at https://trello.com you can select the lock icon in your browser's address bar and under Permissions, change the notifications permissions to block. To disable Trello desktop notifications in Safari, in the Safari header select "Safari", then "Preferences", then "Notifications." In the notifications tab, you will want to find trello.com in the list of websites and select "Deny."
Note: If you have previously denied desktop notifications in Chrome, Firefox, or Safari you may not see the option to enable desktop notifications in your Trello settings page. If this is the case then you can still enable Trello desktop notifications in Chrome and Firefox by selecting the lock icon in your browser's address bar and under Permissions changing the Notifications permissions to allow. In Safari you can enable desktop notifications by selecting "Safari" from the browser's header, then "Preferences", then "Notifications." In the notifications tab, you will want to find trello.com in the list of websites and select "Allow."
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