BTW, can I set when cold boot up it jumps to thermal mode directly instead of MSX mode?
maybe, but i am not sure.
And is it possible to assign short cut to a key such as locking the temperature scale or change to "no measurement"?
Thanks.
with the FW 1.22 and below, yes. You have to extract the facet_z3.rcc files and than you can change files like "Button.qml".
for example, a large press on the left button (archive) will perform NUC. a large press on the right button (back) does nothing.
there you can implant a shortcut... but its many work:
-change something
-repack to .rcc
-upload to camera and replace the existing
-restart the camera
-try
... sometimes maybe a black screen if you make a mistake.
but i am not sure... maybe FW 2.xx prevent changes like this, i don't tried

I think its more easy to implant a small micro controller board with a uart connection to the Camera pcb (debug port). than you can build in your own extra buttons with extra functionality.