ToME: the Tales of Maj'Eyal

Using the new "minimalist" interface, middle-clicking on the map will enlarge it to fullscreen.
But how can I scroll that map, once it is fullscreen?

I believe Ctrl+drag with the mouse will move the map screen around.

Also with cap-lock on, the keyboard arrows will scroll the map.

Sorry, maybe I've been not clear: I'm talking about the map that appears when you middle-click the minimap (or press TAB).
In that case CTRL+click moves the map but also moves the player!
scroll-lock works nice on the main map but does nothing on the enlarged minimap