Android and IOS
Loading a map
Google have changed the menu system so the process of loading a map is different. Click on 'You' at the bottom of the screen, scroll down and select 'Maps' then choose the map you want to view from the list.
Android
Once map is loaded
You cannot remove the overview panel at the bottom when a map is loaded. Clicking in the map area previously removed this but now you just end up in an endless loop going back to the map list. To work around this load the map then quit the App and restart it. The map should still be there from the previous load but the panel at the bottom has gone and you can access the 'My Location' icon.