menu
The three dots on the right of the titlebar will
give you a menu with some possibilities.

edit/add data
A longpress on the map or an item on
the map will give you the opportuntiy
to add or edit locations.

In the machine panel of the add/edit dialog
you can add a machine via the '+' button
in the right-bottom corner

With a press on a pinball machine in the list of
current machines you can change the number
of balls, with a longpress you can delete a machine.

The savebutton will save the new machine list.

add comment/add highscore/share location/verify
A normal press on a blue/white jetbumper opens an
info-dialog about the location.
Here you can add/edit comments or highscores,
or share the location with someone.

The triangle with an eye allows you to indicate
that you have verified the place and that
the current data is correct.

delete account
If you have created an account, you can delete this account completely.
Via app: Go to: 'menu' -> 'account' -> 'menu' -> 'delete account' -> 'Yes'
Via web: Go to: LINK

FAQs

How to get localisation option working on Android 6+ devices?

In versions of Android 6 and above users can block permissions of app, go to:
Settings -> Apps -> Pinball Locations App -> Permissions -> Localisation
to unblock it.