Who needs to sign?
If you're the only one who needs to sign a document, you can use the "Sign" dropdown.
If other need to sign the document, then you need to create a sign request.
Self signing a document
You can self sign a document in DocHub by dragging a signature from the "Sign" menu onto your document. If you don't have any existing signatures created, you'll need to create one first.
Lean more about self-signing documents here:
Creating signatures, self-signing and sending for signature
Getting others to Sign: Creating a Sign Request
If you need other users to sign a document, then you want to create signature fields and assign them to someone.
Learn more about sign requests here:
Sign Requests: Getting Started