[mgmueller]

The manual leaves many features in the dark.
By coincidence I've found out: The "inner ring" (the silver one) manages the font sizes. Obviously, pushing up increases and pushing down decreases the font size.
Very convenient, I very much prefer it over slow popup-menus.
The manual doesn't mention the dictionary (it explains how to use it, but not which one is pre-installed or whether there's one pre-installed at all).
In another forum I've found some links for downloading some dictionaries. This is weak. Dictionary support but having to download free 3rd party dictionaries...
But at least it seems to be functional. So I'll check the various dictionaries and will download a German-English one. Would prefer the ones I've already got from Mobipocket (using on both Kindles for example). But so far I've only seen the Stardict format mentioned