Palm hidden features

Show graffiti version (Palm OS 3.X)

Write ".palm" in the graffiti area

The dot-shortcuts

Those are best entered in the text field of the "Search" function.
All those shortcuts are activated by writing the shortcut-sign, followed by a dot (hint: a real point - so tap twice) and then a number:

Disable hotsync timeout

Show serial registers (Only palm OS 3)