Company card on the System toolbar collects and protects your system-wide settings.
Sent PDFs automatically keeps copies of PDFs sent by emailing or saving PDFs from transactions.
Saving an invoice, the Advanced Print Options let you Email or Save As PDF to send.
Enable Sent PDF in Company, Advanced to have a copy automatically saved in Docs.
Disable Inventory Update let you defer changes to current inventory for back-dated Bills and Invoices.