Yes I know but it's virtually impossible to not jostle the mouse when clicking on a number of vanish points (i.e., dust marks).  But entering in the value is OK...it just kinda stops the momentum during the clean-up process.

Greetings - please consider adding a checkbox for the Vanish tool to 'Lock Radius' once a size has been selected.  Countless times I've slightly moved my mouse while clicking and the radius reverts to '1' or some other random number.  It would be such a time saver to be able to lock a size until you are ready to change it again.

Thank You.