You cannot reply to this document but you may split from it means no replies / comments can be made on the form. . Users can only Split from the document.
When this is toggled on you can:
Select the statuses where the form is locked e.g. when a form is in the CLOSED status you may want users to split only and not reply to the form.
Specify exempted users i.e. who can reply to the locked form.
Only the Author can change Addressing for this document means only the document Author can add / remove names from the address list.
Do not automatically put 'Split' into title if you want the split form created to not have the word "Split" in the title.
Hide Split Button if you do not want the split button to show on the form.
Do not add original message from line to the body of the document is on by default.
Click here for more information about locking responses to forms at specific statuses.
Split Mode / Type
Show Form Type Selection - By Default is toggled on.
Classic Forms Only - By default show mode and security options is toggled on.
Who can see it - who do you want to be able to see these options.
Toggle on Show Exclusions to see which users are excluded from seeing this option.