I would personally say that this is a very bad idea. Coz, it will be very disturbing to enter orders.
If you press "F1" and "F2" in quick succession ,only colour changes ,everything remains UNCHANGED.
I had a bad experience ,previous day.I purchased NIFTY options @64 and
I squaredoff at 83.5.The net position is bulged instead of truncated.
When I opened tradebook ,I did not square off but I purchased the options,
at peak.The high reached was 84.
I have anyway no regrets, because it one of the mistakes committed by all,
when in HURRY.This problem can be solved to some extent by have different
SHAPEs and different locations in screen if possible.
Another idea is to have different keys,rather than adjacent keys.
(like F1 and F12 instead of F1 and F2).