004 ICP DCS switch

The ICP (integrated control panel) is the keypad below the HUD. Its display DED (data entry display) is to the right of it.

The DCS (data control switch) is the 4 way toggle on the bottom with the RTN and SEQ options.
Use RTN to reset, and choose the option from the number keys.
Use SEQ, to change the settting with the focus.
USE the UP/DOWN option to move to a different line on the DED

If you have entered numerical data, don't forget to press the ENTER key on the ICP, to confirm. The UP and DOWN ARROWS, allow the selection of the current steerpoint, from the waypoints list, regardless of what mode the DED is displaying

Activating the options on the DCS is called 'DOBBERING'