Add a field to Form Builder Input Controls to allow a default value or a token.

This would be used to set a default value or pass a token.
Tokens such as DotNetNuke / DNN fields.
Username: [[User:Username]]
UserID: [[User:ID]]
Firstname: [[User:Firstname]]
Lastname: [[IUser:Lastname]]
Display Name: [[User:Displayname]]
etc.

Example
Contact Us Form built from Form Builder.
frm_Contact_Us
Textbox
- ID = Contact_DNN_UserID
- Default Value = [[User:ID]]

Text Area
- ID = Contact_Message
- Default Value = "This site is the best ever until I go an Error"