Nuage - “small” inconvenience with the “up” and “down” arrows

Hello guys!
While using Nuage, I’m encountering a “small” inconvenience with the “up” and “down” arrows. When editing MIDI, it’s not possible to change the note pitch using Nuage’s up and down arrows; you have to use the keyboard. It’s strange because using the Nuage’s right and left keys allows you to select MIDI notes. It seems like the up and down arrows are exclusively tied to track navigation, unlike the right and left arrows.

The second point in my discussion relates to the numeric keypad. Similarly, it is indissolubly linked to transport control. With the upper bottons/selectors (DAW, Locate, Marker…,) you can modify something… but to, for example, when i need to change the mouse-related tool on the timeline (maybe while playback/recording/mixing) by pressing the 1 or 4 key depending on the needs, I again have to take the keyboard from the drawer.
Does anyone have any ideas or advice on how to modify these settings?
Thanks a lot to everyone