quick visibility keys
...because sometimes you just want something to quickly disappear. (for me, that's usually a light object)
What should happen:
Easy GUI with 2 buttons. Key visibility on. Key visibility off.
On key it should check if a visibility track is create, if not, create one. Then key.
It also needs to make sure the tangent mode for the track is stepped. Visibility is an on/off boolean. So the only values should be zero or one. Keeping it stepped avoids problems if you scale/move keys later on.
I don't think I'm missing anything.
Bonus: If there was something on the GUI that would show you if the selected object has any visibility keys, and if something a little different if there is actually a key on your current frame.