There are three options for executing several synchroniz tasks. The three toolbar buttons are:

• search for all tasks with files to synchronize and execute

The above can also be executed by the ⌘B shortcut.

• do an estimation run and present which tasks with files to be synchronized

The above can also be executed by the ⌘T shortcut.

• as above, but for the selected tasks

You can also select a task and by the ⌘R shortcut execute that task. A double click on a task executes an estimation run and shows the result of the estimation.