Since ST9 we have the ability to snap to key points , but it would be better if we could control these snaps with dimension lines..
up until now this is not possible, but I have a workaround.
Create your own snap points, draw a line (in a view on a line) and control this line with a dimension that’s placed on the auto-hide layer.
See attached video.
Geha, The Netherlands
Nice. I suppose you could use points instead of lines in cases where lines would be intrusive in the view.