In many instances you need to precisely position the hits on a surface (such as a plane, sphere, or cone measurement). To do this:
Move the cursor to the position where you wish to take the hit.
Hold down the left mouse button (do not move the mouse).
Release the button. PC-DMIS programs the hit at that point.
You must hold the pointer in one position while holding down the button. Otherwise, PC-DMIS may misinterpret your intention. If the probe tip snaps onto a feature after the button is released, instead of the surface, then the mouse was moved during the process. In that case, press the Alt + "-" (minus) key combination to remove the hit and begin again.
You must set the precise depth before you place discreet hits on a cone, sphere, or plane.