/diy/ - Do It Yourself

So I've been getting back into Altium after an extended hiatus with electronics in general (current job is all mechanical drafting and no electronics).
The irk I'm finding with this software is the line drawing capabilities. Is there a way to draw lines like you would in AutoCAD? I want to specify line lengths but the only way I can conceivably achieve that is by specifying start and end points in reference to the origin. I just want to be able to draw a line and specify the length to be 5mm or 12mils or whatever length I require the line to be. I can specify width just fine but specifying lengths or even slopes seems to be overly cumbersome.