Once again I am attempting to repair someone's 3D hose sketch that has blown up. As I move about the screen I will occasionally click in mid space as I rotate or pan using the mouse. Frequently when I click I am blessed with this wonderfully helpful dimension from one indeterminate spot in space to another. Then I get to select the dim again and delete it to clear the clutter. I don't have any idea what I have turned on to get this. Could someone suggest what I need to turn off?