Can't Find Animation Curve Presets

I’m using Unity 5, and I would like to copy/paste animation curve keyframes. All the tutorials out there say there’s no way to do that outside of the ‘presets’ window.

However, I don’t see an animation curve presets when working on a Mecanim animation clip. The little dropdown that supposedly contains the presets, contains instead ‘Maximize’, ‘Close Tab’, ‘Add Tab’.

Any idea where it could be?

Any thoughts on this? The documentation doesn’t sync up with what I see in the window.

Has the ‘Presets’ window been removed for Mecanim animation clips?