You can attach manuals, check-in guides, or invoices to the automatic emails. You can attach only one file to each email.
Step 1: Go to Settings->Listings->Property or Unit. Open the property or unit and click on Edit.
Step 2: Upload the manual or the check-in guide in the property or unit.
NOTE: If you upload files in both property and its unit, the file in the unit overrides the one in the property.
Step 3: Go to Settings-> Trigger Rules. Find the Trigger Rule of the email you want to attach the file to and open it. Then select Invoice, House Manual, or Check-In Guide from the Attachment dropdown.