This feature doesn't change the size of the Embroidery Design.

It changes the size on the screen only. Notice from pic 1 and pic 2 the design is still the same size. The stitch count is also the same (not showing on these pics but I did check). This shows design at 100% on the screen.

.Name:  IMG_0434.jpg
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Pic 2 shows design at 200% on the screen. Easier to see the design features.

Name:  IMG_0435.jpg
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Size:  37.2 KB

Hope that helps!