In the synchronization detail view you can find the settings and specifications of a single synchronization. This includes the following:

• Connection - View and edit the connection settings for this synchronization.

• Configuration - Define which issues are synchronized, and how fields, workflows, comments and attachments are synced.

• Notifications - Define to who sync error notifications should be send.

• Troubleshooting - Find, analyze, and fix errors affecting this synchronization.

Actions

In the menu (•••) in the top right corner you can find a list of actions you can perform for this synchronization.

• Stop/start synchronization: Enable or disable Backbone from syncing issues and issue data.
  

• Clear Backbone cache: Clear cached data by Backbone. Backbone caches data from Jira, such as a list of available fields. If a new field is added to Jira and it doesn't show in Backbone, you need to clear the cache so Backbone will load it. 
• Resync: Enables you to trigger a resync.
• Pair Existing issues: Import a csv file to pair existing issues. This function can only be used when the synchronization is stopped. 
• Unlink paired issues: Remove the connection between issues that are synced together by unlinking these issues.

• Download synchronized issues: Download all synchronized issues into a JSON file. This can be used for eg. Migrating a Backbone synchronization to a new Jira instance.

• Take the tour: Shows some hints about the different tabs and possibilities of the current screen.
• Documentation: Open the Backbone documentation (in a new tab)