Whenever you see the Map button within the app, selected hills can be shown on a map. Climbed hills are shown in green, and other hills are shown in red. Tapping each pin lets you name and view each hill.
From the main screen, the Map button will show the surrounding/nearest 500 hills from your default location. From a list screen, the selected hills are shown (e.g. all unclimbed Munros), and from an individual hill screen, you can choose to show surrounding hills, the selected “section” or all sections in the selected list.
The selected hill or your default location will be shown in purple.
As well as the default or classic map view, you can also switch to a satellite or hybrid view.
If you enable Google maps in the settings, you also have access to their terrain view.