The left (or bottom depending on your device orientation) pane of the General treatment template allows you to use one of the pre-loaded images or upload your own. This can be a photo of your patient or photo of a document that you wish to mark up. You can choose to have no image at all.
Click the camera icon next to the image dropdown to select one of the photos you may have taken during the patient journey or upload a new one.
Use the mark up tools at the bottom of the image to mark up the image.