How can I change the proportion of the buttons to change the resolution of the GUI screen?

If you create standard menu tools, use the script Vertical Layout Group

2:3 - it works fine,

3:2 - for some reason the menu does not fit.

How to fix ?

[114142-безымянныи-1.png|114142]

Buttons should decrease!

[114143-безымянныи-2.png|114143]

You will need to use UI anchors correctly. Here is an official howto to get you started: Redirect to... title of new-page