Entry Form
Use this field to specify a custom form created to collect recipients' responses from a message.
The contents of this field must use this syntax:
scalarExpression
where scalarExpression is or resolves to the name of a form accessible by all the recipients.
When you click to return to the Event Actions form, the application "wraps" this content within an ENTRYFORM( ) parameter, which yields this final syntax:
ENTRYFORM( scalarExpression )