Synchronize Actions > Synchronize > Update Right / Update Left / Update Both / Mirror to Right / Mirror to Left

In the Actions menu, the Synchronize submenu has commands that synchronize the current selection.
| Update Right | Copies newer and orphan items from left to right.
| Update Left | Copies newer and orphan items from right to left.
| Update Both | Copies newer and orphan items from left to right and from right to left.
| Mirror to Right | Replaces all different items on right, deletes any right-side orphans, and copies any left-side orphans to the right.
| Mirror to Left | Replaces all different items on left, deletes any left-side orphans, and copies any right-side orphans to the left.