Simviation Forums

Anyone have any ideas for me Shift 1, shift 2 etc don't work on my computer I get a half second of a black screen and that's it. If i hit it again it does nothing. Have two computers on steam one is windows 7 (commands work fine) second one is windows 10 (commands don't work) Both computers have fresh installs of steam. Not sure what's the issue. Any help would be most greatful. Scott