How to use Nudge keys to move control points correctly (Nudge Controls)

Hello all,

Yesterday, I was trying to follow the Point Editing chapter of the Level1 Manual (Rhinoceros Help) and found that I was not able to reproduce this section “Use Set X,Y, Z coordinates to adjust points”.

Specifically, I was not able to see that anything changes when I press the “Alt” key down or the rest of combination of keys… and do not see where to push any Arrow key either.

Any help from someone to solve this mistery, please?