I've had this issue for a while and it really slows down my work. When I am trying to create a simple angular dimension with Smart Dimension (as seen by the 45deg dimension), I follow the regular procedure of selecting the tool, clicking one line, then the other line (lines colored green in the picture). Far too often this doesn't work out. It seems my cursor has to be pixel perfect to click the second line. If not perfect, I end up dimensioning just the first line I clicked (as seen by the vertical 76.6 dimension and the 17.0 dimension).
I sometimes have the same trouble when trying to get vertical and horizontal dimensions between two lines. Thankfully there are horz. and vert. dimension tools that prevent the issue by forcing a dimension type. Unfortunately the only angular dimension tool is an ordinate dimension, which won't work well in this case.
My current solution is to convert entities of the 17.0 line and create an angular dimension between a line and an imaginary vertical line:
I use convert entities because the native drawing view line does not register the vertex.
Another solution I use is to zoom in with the magnifying glass so much that I can hone in on the line pixel. This works well but is pretty jenky.
What I want to know is if anyone else has this problem and if there is a better work around than what I am doing. Any tips or tricks?