Please, find detailed instructions on how to add pop-up hints in the Adding pop-up hints Academy article.
Unfortunately, there is no basic option to add hints using standard Creatio tools, but the corresponding task is already registered for our R&D department. It will be implemented in further releases.
Please, let us know in case any further information is required.
I have a project where we have a decent amount of tabs per edit page. Many fields are labeled similarly due to the nature of the project. However, not all of them are required on a given page. I think it would make it easier for the users if there was a way to let them know in which tab they are missing a required value. I attach a picture describing what I mean.