This question is asked with FontForge in mind, but I'm sure that if I get the terminology right then it would help me.
Here's my screenshot:
See how in this font, you can hold the mouse down and view alternates? In this case it's variants for sub and superscripts and such, but with some fonts you get three or four different takes on a character.
I'd like to work this into my font, but I don't know the technical term for what I'm looking for. I guessed Stylistic Alternate, but that's something different that shows up in the OpenType palette. Nothing else has worked yet.
Any thoughts? Like I said, if someone knows how to do this in FontForge that'd be ideal, but just an education on terms would probably help me search for answers better.