In reply to AdrianWalker:
GPS mode shows where you are in the *middle* of the screen and any 'breadcrumbs' if you've set Trip Log to start. As you move a little arrow appears to show your direction. Touching the joystick or buttons will change screen to planning mode. To stop auto switching to planning mode you need to lock the GPS screen (see below).
Planning mode allows you to move around the map & set 'goto' points etc. Like using a map!
Screen Lock : You may wish to lock the
screen to prevent accidental button presses.
From the Power Off? screen - just press the
long Power Button one more time, this will
send you back to previous working screen, and
will place a small yellow padlock icon on the
status bar. Thereafter, pressing any button will
display the Unlock? screen
It is a good GPS tool - it just takes time to learn. A local park or open ground are worth practising in.