The Terminal Canvas

The Payter Apollo terminal is 320 pixels wide by 480 pixels high.

On top of this canvas, you can place multiple elements which are combined to form your desired screen. Each element can be sized individually, and can be partially off screen if desired. An example of this is seen in Payter's standard dialog, where the main dialog box is a rounded corner container that has it's bottom edge beyond the bottom of the screen. Each of the buttons are also rounded edge, and placed so the end is off screen. This has the effect of only showing 50% of the rounded edges, as shown below where the red outline is the actual screen dimensions.

You can also add your own custom background image, upon which other elements are added.