I'd like to reopen https://github.com/folivoraAI/BetterTouchTool/issues/1129 where the main issue was described as:
I want to move the window under the cursor via a mouse button.
The action "Start/Stop Moving" under "Window Resize & Move" almost does what I want. But it is a toggle action, i.e. I have to click the mouse button (press it and release it) to start moving the window and click it again to stop moving the window.
This mode switch seems unintuitive to me. I'd like to have the option to move a window while holding down the mouse button, i.e. pressing the button starts moving the window and releasing the button stops moving it.
As far as I can tell this behaviour is still not possible today, even by calling "Start/stop dragging window" once for Mouse down and again for Mouse up. I believe this is a bug although I would rather that the existing Advanced Settings -> Moving & Resizing pane were updated to also allow a mouse button.