Where is the 'snap to axis' option in the graph editor? I do not have it on in the 3D environment...

It isn't snapping to an axis, as in locked along the y so you can only go up and down. When I move it along x (time) it snaps to 0 or 1 (value).
The keys involved here are motion path position keys, so they can only value between 0 and 1, but I should have all the decimals in between.

All 3D snapping options are turned off (to grid, to points, to curves, etc...)

Can anybody describe to me where the snapping options are for the graph editor?