Why doesn't my screen fill the full width?

Godot Version

4.4.1

Question

Hello everyone,
I’m trying to understand how Godot works.
I have a simple TileMap that I filled with one tile. The scene is set up like this:

And this is the result:

I want the window to scale proportionally and fill the screen width with the green tile, without distortion.

when i try to play with the setting in the display → window
the screen do starch but the godot images get starched to

The window expands in the width, but there is nothing there. If you set keep_height Godot only expands the windows width, but it does not stretch any of your element - you have to handle that yourself. It’s easier to see what’s happening when you disable transparent.
You can read more about the different settings here: Multiple resolutions — Godot Engine (stable) documentation in English.