I can't seem to change the elevation readings on the map to 'feet'. They persist in meters, even though I have the slide selected to 'feet'. How can I make the elevations show up in 'feet'??

When I open the app on iphone or pc laptop I see a search bar at the top. It seems that if I search for a location once, it will appear later (persistantly) in a drop down menu when I click in that search box. But there appears to be a limit to how many choices will appear in the drop down menu of previous locations I've searched for. I have a premium subscription, is there a way to customize the locations in the drop down menu. It seems the old locations just get stuck in that drop down menu and it fills up eventually. Basically, I would like to be able to change those locations which are easy to find when they are in that drop down menu.