What is the Salesforce Textarea Rich field type?
The Textarea Rich is a field that allows users to enter up to 131,072 characters that display on separate lines similar to a Description field. 
In order to draw the Salesforce Textarea Rich to your form you will need to map it to a Paragraph element.
In the following video we will show you how to map your Textarea Rich field from Salesforce to your FormTitan form field.
Enjoy!
Read more about creating online Salesforce forms