MyPhotoApp has over 500 buttons built into the system from which you can choose. But even with 500, it doesn't solve everyones needs. MyPhotoApp has a custom button feature where you can use whatever button you want.
You do this by creating a square button image and storing it on your website. The image can be any size, but a good size would be 65x65 pixels, and any graphic format: jpg, gif, png.
In MyPhotoApp, you then can create a button section (or edit a current button section) and select to add a new Custom Button. It will then prompt you for the URL of where you stored your button.
MyPhotoApp has some built in custom buttons that you can choose from or use as an example for creating your own. Here are the links to some of them: