I have created a fill-in document and there is a sentence that may or may not
be included in the final document. If the statement is not to be included, I
delete it. However, the space that the sentence should have occupied, is now
a blank space and it make the document look unprofessional. Is there anything
I can do to also delete the space if sentence is not needed?

The document has to be password protected so that users do not change its
contents.

Thank you for your help.