BTS Master MT8221B and MT8222B : Instrument Overview : Parameter Setting
  
Parameter Setting
Pop‑up list boxes or edit boxes are used to provide selection lists and selection editors. Scroll through a list of items or parameters with the arrow keys or the rotary knob. Select numerical values by scrolling with the arrow keys or rotary knob or by entering the digits directly from the number keypad. These list boxes and edit boxes frequently display a range of possible values or limits for possible values.
Finalize the input by pressing the rotary knob or the Enter key. At any time before finalizing the input, press the escape (Esc) key to abort the change and retain the previously existing setting.
Some parameters (such as for antennas or couplers) can be added to list boxes by creating them and importing them through the use of Master Software Tools.