Head on over to Settings area of the web app.
You can go to Image > pick an image from our Library there and save it to your computer.
Still in the Settings > click Physical Exam (Templates section)
Click Add > give the template a name > load the image you just saved (or any image you want)
Click the Add button, click on the location on the image and give it a name.
Repeat until you are done then save it.