Use Save 
to save the contents of the open window as a multipart embroidery in .vp4 format. If the embroidery has already been saved, this will save any changes using the existing name and folder.
Use Save for projects that you cannot Export, such as multipart embroidery projects with designs that do not fit in the selected hoop.
When first saving a new embroidery, this saves the embroidery with the name you give it in the Save As dialog.
Save will overwrite the existing embroidery. If you want to change the name and folder of an existing embroidery file before you save it, choose the Save As or Export functions.
Shortcuts
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Quick Access Toolbar; File Menu:
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Keys: Ctrl + S; Alt, 2