If a design has large portions of white thread in it, it will appear as if parts of the design are missing against the white background of the design screen. This is easily fixed.
Click on "View" on the Menu Toolbar. A drop- down menu will appear. The last entry in the menu is "Background Color..." Click on "Back- ground Color..."
The Color box will open. Choosing any color in the box and then clicking the "Okay" button will fill the background of the embroidery design area with that color.
This will allow you to see the entire design, even white parts.