You will need to choose “Airy” template compatible with window envelope.

In order to customize Invoice, open the Invoice form

• Select “Customize” button at the bottom middle
• They offer three Invoice Templates (Airy, Fresh and Friendly) at this time.
• Select “Airy” Template
• Select “More” button
• Select “Window envelope compatible + pay stubs” checkbox
• SAVE
• See attached screenshot photos for reference.