By default, when the user clicks on a sync command item, SyncBreeze starts the selected file synchronization command and executes it in the foreground. Another option provided by SyncBreeze Pro is to execute one or more file synchronization commands in the background. The main reason to execute sync commands in the background is to synchronize multiple disks or directories simultaneously thus reducing the total time required to synchronize multiple directories.

In order to synchronize multiple directories in the background, select all the required sync commands in the command list, press the right mouse button and select the 'Start Background Sync' menu item. SyncBreeze will start all the selected sync commands in the background and mark them as 'Active' in the status field. In order to open a synchronization process dialog for an active command, click on the command item in the commands view.

The process dialog allows one to pause, resume or stop any background file synchronization operation. In addition, the user is provided with the ability to dynamically control the speed of any file synchronization operation. In order to change the speed of a running file synchronization command, just set an appropriate performance mode in the 'Speed' combo box located on the file synchronization process dialog.