# Device Settings Tab Window

> > 1. Device Icon & ID Button - see the description above.
> > 2. Peripheral Prefix - Use this drop down menu to assign a letter prefix (A-Z) to each peripheral device displayed in the Devices Sidebar. The letter prefix is included in all graphic representations of the peripheral as well as I/O labels in Maestro and Core Audio compatible applications.
> > 3. Touch Button Assignment - Use these menus to select the parameter controlled by the user assignable touchpads.