It seems that with the Z2 you have two choices for map direction - North position where it will show you traveling up if you are going north; show you traveling down if you are going south; show you traveling to the right if going east; and show you traveling to the left if going west. If you click the compass point, I guess it is showing the way you are going.
In my old Magellan 700 series, you could have it so the road you were on was always heading towards the top of the screen; basically it looked on the screen what it looked like when looking ahead. Can the Z2 map be changed to display in this way?