Youd have to design it in such a way that you can see linked key combinations.
Example:
If the CTRL key, ALT key and P key were simply highlighted, that could be representing multiple different permultations:
CTRL / ALT / P
CTRL-ALT / P
CTRL / ALT-P
CTRL-ALT-P
CTRL-P /ALT
So youd need a weay to show linked key combinations