CMS DataLife Engine: How to add second textarea to pm?

Question

CMS

Hello!
I need to add a second textarea to private messages. By default, we will fill in two inputs - the name of the recipient and the subject of the message , and one textarea - the text of the message . I need to add another textarea . It should be possible to fill it out when writing a message/response and it should be displayed when received. I suppose you need to edit engine/modules/pm.php , but I'm not friends with php and I don't know what exactly to do there. Can you suggest?
Sincerely,
Alexander.

Answer 1

adding an additional textarea tag to engine/modules/pm.php is not enough, you also need to add the processing of a new field and, of course, add it to the database.
If you can’t do it on your own, contact freelancers.