How to find applicable style classes?

[stephen-warm-graph]

For example, I know that I can define h_hidden in my form model settings and then apply it to controls.
It still works in latest a12 release, but I can no longer find any documentation for that.

I have this link in my bookmarks:
<INTERNAL_LINK>
but the content is awol.

[ahmad-warm-vale]

Hi @stephen-warm-graph,

Here you can find the Utility classes and Helper Classes documentation.

[stephen-warm-graph]

Ah, thanks!
Haven’t found h_hidden there, though.
Should I now use -u-hidden instead?

[ahmad-warm-vale]

No worries

There is a multi-select button where you can choose different classes and it will apply directly to the section below.

I would suggest choosing u-hidden if it will apply as it is supposed to be.