TYPO3 Core

For structuring all sorts of content elements, it would be extremely handy to have an additional property "help" to add to any TCA field type.

Reason: in structured content elements, it can be helpful to add more info below a field than cramming it all into the label.

It's a very helpful tool for editors and content strategists alike.
It basically saves you from writing manuals AND style guides!

Also extbase extensions and extbase content construction kits like DCE and mask will benefit from that.

Use cases:

Label: Call to action
Help text: A sentence that will make the user want to go on

Label: Image
Help Text: Use photos of sports activities only, and pick a closeup detail.

Label: Document
Help Text: Add a PDF of the according law based on codex 123xyz

In the attachment, check out the fake screenshot. Really, all it needs is one (wrapping) line of text.

This text must be always visible, not like "CSH" only after an user's action. Also, the configuration of CSH is too complex.

I think this would be a big, and quick, win.