Hey all, I'm looking to make my mouse's scroll left / right into CMD / ALT. This can be achieved via Logitech's app, but I want to keep everything within BTT for the sake of organization. Keyboard inputs in BTT only accept the combination of a regular key+modifier and BTT preset actions only have the option of either doing modifier down or up.
I need the modifier to remain active (pressed down) until I release it. Any way I can achieve that? Many thanks.
That’s what I meant with the preset actions only allowing for up or down. Maybe I am missing something ? How would I go about setting this up so the mouse key behaves like a regular modifier key?
Mhh, I have no experience with it because I don't have a mouse.
But probably you need two actions set up with these actions
mouse button pressed and hold = modifier down
mouse button released = modifier released (Up).
This is what the manual says
BetterTouchTool allows you to select whether you want a shortcut to trigger on key down or on key up. This can be useful if you want to e.g. trigger one action on key down (e.g. middle-mouse down using the custom click predefined action) and another action on key up (e.g. middle-mouse up).
In such a case you would just configure two shortcuts with the same keys. Then you would check the "Trigger on down" checkbox for one of them.
I tried this but the modifier gets permanently stuck and I have to force quit BTT.
Did you copy/paste an action and then change the modifier up/down? Or did you delete a modifier that you inserted by mistake? I don't know why, but that often doesn't work.
Delete both actions and set both up again. Sometimes this helps. 
Indeed I had duplicated it before, but I tried again just now all manual in one straight go and I am getting the same behavior - modifier will not release on key up 
I thought maybe I was just using these in the wrong way, but as you pointed out in the documentation, this is pretty much the exact example given. I suppose this is a bug then.
