Visio Shape Default Fill

I read in your 2011 "Default shape attributes when starting Visio (Visio 2010)"comment that to set a default shape fill, I should create a custom shape and place it in a custom stencil.  I recently received a visio.vsd drawing from an outside organization.  I noticed that using their Basic Shapes (US Units) template, their shapes came onto the grid filled white (01: Solid) with a line weight of 1.2 pt.  They appear to have accomplished this without creating a custom stencil/custom shape.  Do you know how they were able to achieve this?