I have a MacBook Pro with two large monitors. I like to have a keyboard and mouse in front of each monitor, so I have keyboard/trackpad in the MacBook Pro, an original Apple keyboard/mouse in front of one monitor, and I bought a very cheap Windows wireless keyboard/mouse for the other monitor.
The problem is: On the "Windows" keyboard the key left of the space bar is marked as "Alt" and works like "Alt/option", the next key is marked "Windows" and works as "Command", while on the Mac keyboards the first key is "Command" and the next one is "Option", so when I type blind I always use option instead of command on the PC keyboard and vice versa.
Problem: How can I change this? System preferences doesn't seem to think there are different keyboards connected. If this was my only keyboard then System preferences would let me swap option and command, but if I try this then I have the same problem on the Mac keyboards.