Comment 5 for bug 171181

Or the effects you can apply to a Graphic/Movie Clip symbol
in Flash.

Change Alpha: already implemented through master opacity
Add tint: add a certain amount of a certain color to all the
objects in the group
Advanced: let's you basicly add/substract and/or multiply
each part of the color(RGBA) by a certain number and applies
it to all sub objects/paths.

things like this would be very useful. right now i am
exporting all my SVGs into PNGs and having a GIMP script
turn them greyscale because i used images from the Open
Clipart Library as backgrounds and there was no way to turn
them greyscale...