Turn off selection highlighting ?

 From:  TOM (SIRTOM)
10603.1 
Hi,

MOI is also very useful for designing 2d graphic art.

And here I would regard it to be helpful to be able to turn
off the selection highlighting for curves when performing
changes - without the thick yellow lines of the highlighting
appearing on the screen.

In best case just with one keystroke.

So here goes my question : Is this possible without the
to manually changing the command files ?