Defining a Preset Shape
It is quite easy to specify a preset shape as that is the whole notion around presets. They are meant to solve the most common cases of shape definition.
To specify a heart shape for instance the following DrawingML code can be used.
<p:sp> <p:spPr> <a:xfrm> <a:off x="1981200" y="533400"/> <a:ext cx="1143000" cy="1066800"/> </a:xfrm> <a:prstGeom prst="heart"> </a:prstGeom> </p:spPr> </p:sp>
This heart is rendered by the generating application using the custom shape code for this shape, which is fully documented within <ST_ShapeTypes>
located in the reference documentation. Thus, we see that the user need on specify the preset name to place a shape within their document.