Thanks.
Went to Profile>Data screens>Map (always) there are 0 layout & data fields. The data screen I was on has a load of fields, but there doesn't seem to be a way to have the temporary pop up map navigation screen prompt to appear (as you approach a junction) without heading & time to point. Not a biggy, as it's not there if I'm on the main navigation map anyway, and if I want max map area I'll stay on the main map.