I'm having a hell of a time selecting/moving pins in Symbol Editor. The only way I can select a pin is to drag a box around it, I can't just click on the pin. Even when I do ultimately get the pin selected, I can't move it; as soon as I click to drag the pin, it becomes unselected. Sometimes, I can drag a pin, but it seems to be random whether I can or not. This is a symbol I created, the problem doesn't seem to exist with Mentor parts.
I've poked around, but can't seem to find any setting that makes this work.