Developer Advice: Simulate multitouch with key or mouse

Hi, I'm a game developer and my QA teammate uses scrcpy to test our games in multiple remote phones with different specs. This is working nice so far, but we just have one issue: In this game (which is in a develop version) you can open the "cheat console" with a **3-finger touch**, this is an important feature for the QA team because it helps them to quickly test their cases.

The PC doesn't have a touch screen (I read that multitouch is possible with it), so what we'd like is to assign some key or key-mouse combination to achieve this. I know this is a very specific feature, so I was thinking I can implement it myself locally (without making a PR) but first I want to know if that implementation is possible, and if it's possible I would like an advice on which files I would need to modify.

Thanks in advance.

Start by reviewing scrcpy's existing keyboard, mouse, and touch-input handling to determine whether a key or key-mouse combination can generate a three-finger gesture. Define the desired binding and verify it on a non-touch PC with a remote Android phone; done means the cheat console opens reliably for the QA scenario.

Written by the indexing model from the issue text.