My colleague typed in a messaged that exceeded the 750 character limit and hit send.  In return, he got an error message and lost everything he thoughtfully wrote.  Three questions: 

• Is there a way to add text to let people upfront know that there is a 750 character limit?


• Any way to constrain the box to prevent users from entering in more than 750 characters?


• Is there any way to prevent data loss?  

okay, a fourth question: How can we make this so that it doesn't happen again?

It's a bummer to lose a message you put so much time putting together.  Thank you!