Anyone (Including your clients) can print a copy of their invoice. 

FROM THE WEB APP

Step 1: Open an invoice.
Step 2: Click "Print" at the top of the page.
Step 3: Select the print options from your device.

FROM THE MOBILE APP

Step 1: Tap to open an invoice.
Step 2: Click the "Print" action button at the top of the page.
Step 3: Select the print options from your device.

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