Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Hi, my question is easy. I don't know how to make the caption's textarea required for user.
Is it possible to do this?
See if either of these plugins helps you do that: Custom Field Template or Mandatory Fields.
If not, it might require changes to a theme's functions.php. Hopefully, you don't have to change anything in the core WordPress files - that can be quite risky.
Required, but never shown