How do I Zoom in and out using Touch (Pinch) and Limit zoom out by layout

I checked a few examples: https://editor.construct.net/#open=touch-zooming and https://howtoconstructdemos.com/download/zoom-pinch-touch-gesture/.

Question #1: Then I started to make my own simple version of it (without panning and UID) and encountered a bug - the screen is shaking while zooming.

Question #2: How can I limit zoom out by layout size? Is there an easy way to do this? My idea was to limit it using ScrollTo behavior, but it's not working as I expected.

C3P File: https://www.dropbox.com/scl/fi/x2t87b3is6sprvb1pn3s9/Zoom.c3p?rlkey=37rdrvavt4o50a332jov55rkg&st=5jbqbpez&dl=0

Any advice would be helpful

Update on zoom out limits:

As far as I can see, there is no option to change the viewport width or height and layout width or height when the game is running.

1) One way to hard limit is to use layout scale, but only in fullscreen mode: letterbox scale (with black bars). However, this method fails when using fullscreen mode: scale outer.

2) Another idea was to divide (Viewport Width / ViewportWidth(1)) and then use it as a limiter, but it's not working well either.

Here is my updated C3P: https://www.dropbox.com/scl/fi/241juvky5pk5uqhtswfl2/Zoom-0.3.c3p?rlkey=qp5lflsz36pquqb69mxmjp0n3&st=em4ueshx&dl=0

If you want to simply constrain the scale, use:

clamp(LayoutScale, minLayoutScale, maxLayoutScale)

Where:

• minLayoutScale – variable for the minimum scale (e.g., 0.5)
• maxLayoutScale – variable for the maximum scale (e.g., 2.0)

(P.S. If you are using the "LayoutScale" method, be sure to verify that your UI layers have Scale Rate = 0)