B4J Question WYSIWIG Designer always has form at 600x600

I have this in my project attributes:
#Region Project Attributes #MainFormWidth: 1000 #MainFormHeight: 625 #End Region

I created a new variant, set to a size of 1000x625, and deleted the default variant of 600x600.
But the WYSIWIG Designer always opens at a size of 600x600. Tried disconnecting/reconnecting to the 'device'. No change.

Where do I set the wysiwig designer to open at a specified size?

Thank you!