Hi.
I have a user form with a few inputs (see attached image). A filename, subject, and email option all need to be entered/chosen.
I would like to have a dynamic error message for the end user. How do I create the message box to show a message letting the user know which items are missing? For example, may be, "You are missing a filename," or, "You are missing a filename and subject," etc.
Thanks.
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