The current structure... (not current anymore)

Image bg transparent while the ribbon's bg is black...

Add a seporate bg tag (rejected)

- this effectively doubles the number of tags used for a ribbon...
+ the only API that needs changing is what deals with previews and filters
+ will simplify different image indicator CSS
~~+ will remove LOTS of code dealing with scaling, sizing and rotation...~~ this will not change!

Keep the images on one level and marks outside, after the image...

+ one tag per UI element and only if that element is present (no dot, no tag), or if we make things a bit more comlicated, up to 3 per tag (self, before and after)
+ generic and extensible
- a little bit more complicated mark manipulation during image shifting – potential orphaned or misplaces marks...