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Go to Catalog > Collections when all vendors are found:
Click "Selector":
Open "Autosets" tab:
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Open "Collections" section to show each category with collections on home page:
Click "Selector":
Find category (we created before) on opened page on the right:
Add it into column on the left clicking plus button:
Save.
Open "Settings" tab:
Enter number of goods we want to show on home page (or leave 8 by default):
Ready: