Form Designer Option: Default Text

To add Default Text:

1. Select the box on the form (in form designer) that you want to have default text.
2. Then click into the "Default Text" box on the Properties panel on the right-hand side and type in your text. 
3. This will then will always be on this form, although you have the option to type over it anytime. 

If you are only adding in Default Text, you won't need to change your rollups or any tags, or form controls.