How do I sort products in the admin
Since Zen Cart 1.5.6, it has been possible to sort lists of products on the Categories/Products page at the products level.
Use the Categories/Product Display Order dropdown, and pick the field you would like to sort on. Your product list will now be sorted by that field.
Note: This only changes the view in the admin; on the storefront side, the sort order field will determine how products are sorted.