?-button when using sources

Running RM9 ( on windows 11
In help > Creating a source template > Source template form
“? - x indicates there is a long hint defined for this source field. … …”

Editing source template field:
“Long hint for this field (shown when user clicks ? Button)”

Where does user find the “? button” when using the source template?

I’ve reported the bug awhile back.
I’d suggest you also create a ticket

Thanks Richard. Good to know its not just me being blind!
I’ve now contacted Tech Support and asked the same question so will see what follows.