How do I permit only specific values in Manually editable HTML tags field?

I don’t think it is advantageous to have a documentation request and a support request that are essentially the same.

The documentation request is for the UI to be updated, which will take a while, at the very least to the next release. I did the separate support request because I am seeking to accomplish this right now and need the support timely. They are two separate things even though they cover the same topic.

Restricting styles to specific values is not supported nor will it be supported. See filter_html's strict policy on not allowing any style attribute at all — it's either that or allowing all style attribute values.

If you want this, a contrib module will need to be used, core will not provide support for this extremely edge case-y feature.

Automatically closed - issue fixed for 2 weeks with no activity.