AASTRA DT4x2 for MD Evolution User Guide EN - Manual (Page 31)

31 MD Evolution – Cordless DT412 / DT422 / DT432
DT4X2 General Description
Each mode in the menu can be hidden individually. This makes it
possible to remove modes that are not used from the menu. Note
that it is still possible to change to the hidden modes with help of
Soft and Hot keys.