There are a few things you need to know if you want to name photos on your iPhone. First, the photo must be in a format that can be stored on your phone. This could be JPEG, PNG, or GIF. Second, the photo must have a filename that begins with an underscore (_). For example, my_photo1.jpg would become my_photo1_underscore.jpg. Finally, the photo must be in the same resolution as your phone’s camera. For example, my_photo1@2x would become my_photo1_2x.
