BENDIXKing AeroNav 910 Pilot's Manual page 54

AeroNav 900/880 Series Pilot's Guide
Virtual Alpha Keyboard
Virtual Numeric Keyboard
Each keyboard has a scratchpad in the lower right corner. The
scratchpad is a free text field for data entry with some data entry
validity logic applied to the data that is trying to be entered. For
example, when trying to enter an invalid frequency, the com
89000039-010
1-44 System Overview Rev 1 May 2019