Vivotek NR9682-v2 64-Channel NVR (No HDD) - Manual (Page 261)

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User's Manual - 261
5. To assign or re-assign a button's function, single-click on the button number besides a
function. Click the Delete button. The below message will display.
Press a preferred button on your joystick to complete the setting.
If a button conflict occurs, (another function has already been assigned to the same button),
the below message will prompt. You can Cancel or click Apply to change the assignment.
Repeat the above process and click the Apply button to preserve your settings.