Sync
From Snowfire Wiki
Sync is used by layout components such as com_singlerow and com_image. It's a great way to synchronize a text or an image across multiple pages.
Let's say you have an image on the top of every page and you want it to change on all pages if the user is changes it on one single page.
Example:
{ com_image ( id: '10', description: 'Logo', syncId: '1' ) }
The syncId tells Snowfire to update all pages where a component has syncId when it's changed.
Video tutorial (swedish)
