Align Box's children at start/center/end

[cognitive_toilet (Cogto)]

I’m trying to align the children in the Box in the center. Looking at the CSS properties, it doesn’t seem to be possible through CSS.

I’m aware of halign and valign, and that I could use halign as center, but nothing happens if I set it:

A more detailed view into the structure:

[Holger]

Put one child at the beginning and one child and the end of `GtkBox` in GTK4 using XML

Best Regards

[cognitive_toilet (Cogto)]

@cognitive_toilet

but nothing happens if I set it:

My bad, setting halign works!