After a request on the Facebook group I thought I'd put instructions here so that there's a permanent, easily-found reference. If you want to play ADOM looking like this:
compromise.png
Then set your NotEYE 'm' (graphical mode and mini-map) and 'r' (font, resolution and fullscreen) menus to these settings:
how2display.jpg
This is set up for a 1920 * 1080 resolution. (I'm on Windows 10, in case that's relevant to anyone).