So I got this request to make a multi-line text field scroll in one of my forms. That sounded easy enough. But there seems to be a problem when you also have a line-character length set. If you set a line character limit, it greys out the ability to set it as a multi-line field.
To get around that, I decided to hack the field validation a bit. Instead of using the character limit count in the list item, I used an expression in the validation rule to check the character length and fire an error if it’s over 320 characters:
That was the magic combination to allow the text to scroll down in the field, while still limiting the number of characters allowed. Instead of just stopping at the 321st character, it fires a validation error if it goes over that length.
Not quite as clean as the character size limit field on the list item, but it works.
SharePoint Duffbert 