Is there a way to lock the position of a group of ordinate dimensions?  Many times the dimensions overlap each other so I have to move them vertically, or readjust the leaders so that they're easier to see. (ex. dim 2.619, 2.643, 2.682) The problem comes when fine tuning. I'll adjust a dimension up and accidentally shift every dimension left, which displaces the positioning of all leaders. I want to be able to lock the horizontal position of 0 so that the rest of the dimensions don't move around when trying to adjust the lines.

Figure 1, original positions

Figure 2, displaced leaders

I can just press the UNDO button all day, but it seems like there should be an easier way.