HI, it is too easy to move the selected FREQ by moving the mouse around the monitor desktop and in the rx waterfall.
That means going off the listening frequency and coming back is almost impossible in that important few seconds needed to retune
when me ( the HAM or SWL) am listening to that precious signal.
Therefore a LOCK button for the tuner would be of great help; leave to the developer the chosing of the LOCK color (...maybe RED :-) )
and put the ON\OFF function to one of the F keys or any other keyboard button.
PS a memory of the last used freq would be also of help