Hello, I use Solidworks 2013.  I'm working on small aspects of a large part, and I'm trying to dimension a sketch, in the middle of the part, and I can't seem to figure out how to keep from selecting another face when I try and place the dimension.

I'm often working on a small 3d sketch, zoomed way in. I've tried holding down a dozen different keys when I click, but it always selects whatever face is in front of the camera. There are no angles I can work at, to get empty space in view to click, and it's infuriating to have to zoom in, click the line I want to dimension, then zoom out to place the dimension somewhere outside the model, and then drag that dimension back in, zoom in, and, finally, reposition the dimension near the sketch that I'm working on.

Selection through transparency is the only thing that seems relevant, but it has no effect on this behavior. Is there a key I can hold to keep Smart Dimensions from selecting anything else and just place the dimension where I click?

Thank you

-Peter