What is?
XStart is different than others program launchers, it doesn't use space on screen when not required.
When an item is launched, the main window disappears automatically.

To show or hide the main window, just click on the tray icon near the clock (or press WIN + Up).
To navigate between the groups, use the window title buttons (or press WIN + [Arrows]).

Tray icon Up button Left button Right button

: : : :

Show / Hide window Go up Previous group Next group

You can also use the following shortcut keys (since XStart 2.0).

The combinations can be customized as wished.