Editing the angle of a line.

 From:  blowlamp
Greetings, all.

It would be a great help to me if someone could explain how to do this in MoI, as I can't seem to figure it out.

Suppose I draw a line at some odd angle, say 23.27 degrees, but later suspect I've actually entered it as 23.72 degrees. Is there a way to verify the line angle and also a way to accurately correct it, or do I delete and start again?
If the latter is the recommended way, then I'm thinking it could get a bit more involved if I'd drawn something like a spoked wheel.

I'd appreciate any assistance with this.

Martin (2).