In a drawing I try to put out the angle between two planes through a shared axis. It is 15 deg between them, however I only get the opposite angle, ie 345 deg and can't seem to to change/flip so I see the smaller value. Any ideas on how to do this and to make it take the smaller value as standard?
I have not found a way to do this with infinite features such as planes. This makes it really hard to use that dimension in drawings. However, if it is important to you, and you have a policy to make associative dimensions, you could create a sketch with features that drive the plane. In the sketch, you can control angle dimensions much better depending on where you place the dimension.
From a quick drawing: just adding one plane, defining it from one from the coordinate system and then using show annotations in the drawing.