Is it possible to lock layout spacing options to predetermined values?

[crs1138]

How can I achieve a similar UI as for font sizes but with padding/margin values?

[fabiankaegy]

@crs1138 Not currently. But it is actively getting worked on in this issue here: #39371

[crs1138]

I found spacingSizes in the theme.json schema. How do they work? Is there any example on how to use them?

https://developer.wordpress.org/block-editor/reference-guides/theme-json-reference/theme-json-living/

[fabiankaegy]

Essentially the way this works here is that the URL has a placeholder for the branch name here on GitHub in it:
https://schemas.wp.org/${BRANCH_NAME}/theme.json

[crs1138]

Would that be a branch of the @wordpress/gutenberg repo or @wordpress/wordpress?

[fabiankaegy]

@crs1138 the @wordpress/gutenberg repo

[fabiankaegy]

So for 5.9 for example the actual schema definition lives here: https://github.com/WordPress/gutenberg/blob/wp/5.9/schemas/json/theme.json

[crs1138]

Thank you for clarifying that.