Newbie here... .... to forum and to Krita too. First post.
So I got this Huion 1490 and it has 12 "express keys" or buttons on the tablet that can be set to any Krita shortcut. The pen also has 2 buttons (a third is actually pressing the pen to the surface). The pen's three buttons are set by default to emulate a 3-button mouse clicks.

I am overwhelmed by all the shortcuts and wondered if someone with more experience could recommend what shortcuts they would set-up for the 12 buttons (and three pen functions?)

Thanks

Hey, here is a mini list of the one I tested. I can't use them all , I only have five buttons here. Pick your choice in it Sometime, it's also good to paste little stickers on the key or next to them to remember what they do. I'll add a little star at the end of the line of the one that are my favorites.

Classics:
Ctrl color picker ★
Ctrl+Z undo ★
Ctrl+shift+Z redo
Ctrl+S quick save
f fill tool
b brush tool

Brushes:
e eraser mode ★
v draw quick line
] increase brush size ★
[ decrease brush size ★
/ toggle switch to previous selected preset ★
i decrease opacity
o increase opacity
k darken color
l lighten color
h show color history
d reset color to black
shift+i color selector

Layer:
R pick layer on-canvas mode ★
page-up activate layer up
page-down activate layer down

Navigation:
Tab Canvas mode only ★
M mirror canvas ★
+ zoom in
- zoom out
numpad4 Rotate canvas left
numpad6 Rotate canvas right
numpad5 reset canvas rotation