A collection's products can be chosen by hand or matched by rules: a tag, product type, vendor, price range, on sale, published in the last number of days, or in stock, matching all rules or any rule. Each collection has a product order: your own, newest first, by price, or by name.
New collection asks only for a name and opens the collection's page. Add, remove and reorder its products there, with a search that finds any product in the Store. Its name, description, address, publishing, a time to publish it, its product order and its search-engine text change from Edit details in the More menu.
The Store home and collection pages have Filters for price, options such as size, product type, brand, tag and In stock only, which work with search, sort and pages. Sold-out products are now listed and marked.