I am using a US keyboard layout, but I need German Umlaute as well. Under windows it was easy to map LWIN + ; to produce an ä, LWIN + ' to an ö.
I read about xbindkeys, xmodmap, ... but everywhere I just don't seem to get the combination right.
How would I do that in Linux/Ubuntu? Thank you so much for your help, it is the last thing keeping me from switching full time to Linux.