By clicking one of these buttons or by pressing one of the
Function keys F1 to F8 you can activate the corresponding function. For the functions
Help (F1) and
Reread directory (F2) there are no buttons to avoid overcrowding the window. The
F3,
F4 and
F8 buttons also work as targets for
Drag&Drop.
You can right click on the F8 button to open the Recycle Bin.