Often I am looking at a chord and find that I need to put a scale to it. For example the chord of C major may be related to the major scale, or a lydian - depending on context. Other chords are more exotic and call for exotic scales. It could be an idea to make these scales visible in some way on the chord sheet window. So, for example, of a major scale is shown the possible 'suggested scale' might be a Lydian or an Ionian, or something else. This could also be set by the user.

A useful learning tool, esp for the more complex chords?