[iOS] PDFNet Custom Annotation Tools

I am attempting to extend an existing tool to add custom functionality (specifically RectangleCreate).

I am having a hard time tracking down how to change the default annotation properties for this tool. Is there a way to set the default fill color / alpha on the tool, or a method I can override to specify these properties?

Thanks.

Please see the ColorDefaults.h file in the Tools project. This interface allows you to control defaults.