How do I know when everyone has signed the document?

You will receive an automated email once everyone has signed, with the document attached. 

You can also view the status of a document at any time. Find it under the Documents tab, if anyone still needs to sign, it will show awaiting_signatures. Click View in the Actions column on the right. When the document is still in progress, you will see the status of each signer at the top of the screen. You can also scroll down to the Audit Trail at the bottom of the page; this will show you everything that has happened so far, for example which signers have received the document and whether they have signed.