I've got this T shaped pad that I've made with 2 fill rectangles. How do I assign a designator to it? I've tried converting to a region and couldn't figure it out that way either. I'm using AD10. Thanks.
Simply add a pad (can be a small one) and assign an Designator to it (e.g.: 3). When that structure is added to the PCB, the whole area will be connected to "3". Be aware that this only works for fills, not for solid regions or lines. You could also add multiple pads and assign "3" to each of them to form your T.