CMC-AI Jog Mode - Cubase Pro 8

Hey guys, help ! i just got a AI, i have cubase Pro 9.5, i see you talk to change the bar numbers like 1.1.1.0 to 1.1.2.0 but i can’t here.
worst, i bought it to be able to modify the velocity of a note in the midi editor. i’m a hand disabled person, and i often must edit a crazy amont of velocity on a recording, so i tought “ok , put the mouse on the velocity in the info bar”, hit Lock, and modify the velocity for each note but it’s not working ! it’s working for a fader, a button, in a plugin or the mixboad, on some setting in the inspector, but can’t do it on the transport for example, or the place where a note is. if the note is at 1.1.4.0 and i want to move it by putting the mouse on the 4. , well it has no effect. any idea what’s i’m doing wrong ? I’ll post this message as a topic. sorry if i bother any of you. i hope it’s ok !