@FiXato Not sure. I don't have much space on the desk, and no (current) use for the wheel part. I need something under my standing desk to act as a push-to-talk button or a modifier or something along those lines.
@algernon does it need to be pressure sensitive?
@FiXato Nope. Just an on/off toggle is fine.
@algernon judging by your website, I assume this is for a Linux machine, so perhaps a spare USB mouse could work till you find a proper pedal?
Redefine the keys to do what you want through #XInput:
You can probably disable the actual mouse pointer through that too, or else just tape over the laser?
Would give you 2 fairly easily accessible buttons you can reprogram. 3 or more depending on your mouse and how nimble your toes are. ;)
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