HMI - Managing I/O Field behavior

Hi.  Is it possible set an I/O Field, in input or input/output mode, to not pop up the on-screen input keypad?

Most of the time the keypad is useful, but in this case I want the machine operator to use function keys instead to increment/decrement motor RPM values during runtime. 

I'm using an S7-1200 PLC & KTP400 Basic HMI.

Thanks in advance.

Regards,

Dale