Hello everyone,
I'm a windows user but a friend who is a mac user said to me that she's having issues with one key shortcuts and the undo command on her autocad. I tryied to search any solution but can't find nothing about the problem.
She told me that probably made some kind of shortcut while working on keyobard and activated/deactivated any "undo" option or one key shortcut option that canceled all one key shortcut (having to write all the word to perform the command) and when she types the first letter of any command, it apears a little blue box with "undo" writen under the command line, and when she press enter, it undoes instead of performing the disired command.
Thankyou for helping me, i appreciate it 
i don't think so, even without dynamic input it is possible to enter one key shortcut such as "l" for line "m" for move! at least i tryed to turn off all those options that you showed me, in my windows autocad, and i still could use one key short cut commands. i don´t know if it is diferent in mac
she sent me this picture when she asked me for help
i told her to do that but she custumized her workspace and she didn't know how o save the workspace settings when she did it. I'm not sure if saving workspace now will also save the problem and even after reseting autocad and restoring her workspace the problem will be there 
and is out of question to restore the workspace manually 