RIGOL DP832A - Manual (Page 48)

RIGOL
8 DP800A Quick Guide
4. Preset
Restore all the settings of the instrument to default values or recall
the user-defined channel voltage/current configurations.
5. OK
Confirm the parameter setting.
Press and hold this key to lock the front panel keys; at this point,
the front panel keys (except the output on/off key of each
channel) are not available. Press and hold this key again to
unlock the front panel keys. When the keyboard lock password
is enabled, users need to input the correct password (2012) to
unlock the front panel keys.
6. Back
Delete the character currently before the cursor.
When the instrument is in remote mode, press this key to return
to local mode.