Palm Tungsten T2 Handbook page 451

Tap the Automatically pick list and select either Mask Private Records or Hide
2.
Public Records.
Tap When box.
3.
Select At a preset time, and then use the arrows to set the time.
4.
Tap OK.
5.
Turn off and then turn on your handheld to enable this change.
NOTE
To automatically hide or mask your records after a period of inactivity:
Select Automatic.
1.
Select to mask or hide records
Tap box
Select At a
preset time
Select Automatic
Setting Personal Preferences
437