FR: clear/white view

[robmarkcole]

This would allow displaying the annotations on a clear or white background, which I think may be easier to visualise than when overlaid on an image. Not currently an option

[robmarkcole]

Previewing mask.png shows what I am suggesting:

[aliFrancis]

Absolutely! I think this is a nice idea. I will look into this in a future update. Perhaps it might be nice to be able to access something like $MASK in the config file, to allow for manipulation of the mask colours in new views, the default being this kind of clear-white/black background one.