Highlight transparent areas on Draw X8 background

Hello

Possible silly question coming up...

I'm creating some white shapes in Draw X8 to use as a mask in Corel Video Studio.

However, they don't show up against the transparent page background.

Is there a way to use a colour/pattern alias for transparent areas?

eg... Using MSPaint will show transparent areas in a PNG using a checkered pattern.

Thanks!

Rich