mark semi-tone globally

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I think it would be an idea if marking semi-tones had an option: 'global' . Choosing this would not only mark the semi-tone in that octave, but also the same semi-tone in all other octaves -and as now all tracks ofcause. Would aid in composing, and should be fairly simple to implement.
Br.
Forgive my ignorance, but what exactly do you mean with "marking"?
in piano-roll you can since 0.4.13 right-click the individual notes on the piano-keyboard and from a context-menu choose 'Mark semitone'
This will set a thin colored horisontal line through that note in the pianoroll, and in all tracks! - I would like this marking to be optional for all octaves
You can see the context menu in question in my video about the scale-bug
Here:
http://www.youtube.com/watch?v=qBN6Hjom6S0

Br.