You can include your logo on your invoices, so that when you print them off or email them to your patients, they'll include your own branding! Before getting started, it's best if you have your logo ready to go and stored in an easy-to-find place, such as your desktop or documents folder.
Here's a video of the process:
Add your logo to invoices
Head to Settings, and then Documents & printing:
Click the Choose file button:
Select your logo from its spot on your computer, and upload it. You won't see it right away—first, click the Save document settings button at the bottom of the page:
Head back into your Documents & printing settings, and you will now see that your logo has been uploaded:
Now for the next step—getting it to display on your invoices!
Under Invoices, be sure that you tick the box next to Show logo in invoices:
The page size is the size of the paper you're printing out (A4, A5, or US Letter), and the top margin is the space above your logo, at the top of the page.
Once you've done the above, click the Save document settings at the bottom, and from this point forward, your invoices and account statements will show your logo!
Below is an example of what the logo would look like on your PDF invoices: