Does anyone know of a way to use the Input command on the graph screen, instead of on the usual home screen?
I dont think its possible. You'll have to make your own input routine with getKey^r
Yeah sadly I don't think you can do that. In TI-BASIC the closest thing you can do is set the calc in Horiz/Horizonal/Split-screen mode. It will show half of the graph screen and half of the home screen. In Axe you probably need to do as Cumred says.
Using getKey would unfortunately be the only way.
http://tibasicdev.wikidot.com/custominput (http://tibasicdev.wikidot.com/custominput)
I think you can use something like this technique.