Adding a logo to your invoice is a simple as adding a picture to a text message. Press the '+ logo' icon at the top (see image below for reference).* Then, simply take a picture with your camera or head to your photo library to select the image you would like to add. Resize and position your image within the square frame and voila!
*[Please note: the '+ add logo' feature is not available on iPads - only iPhones.]