Trust X-RAY Mode D'emploi page 6

GXT 138 Gaming Mouse - USER'S MANUAL
Button Programming
3. Key Setting
a - Click on 'Mode A' or 'Mode B' to swap between key profiles.
b - Click on the key setting you want to re-assign.
c - Click on function you want to assign.
- Click on 'Apply', the mouse is being updated. (The selected key mode mode will be active)
- At least one button has to be assigned as "Left Click".
- Click on the 'Default' below to reset key settings to factory default.
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