If a usable off-cut is left over from a sheet after cutting, you can add it to the warehouse as a remnant — assign it to a storage cell to use in future orders.
There are two ways to create a remnant: "by order" (the remnant is linked to a specific order in production) and "without an order" (added manually, with no link). Only a remnant not linked to an order can be deleted.
Editing and adding are available after paying for the production cabinet. Until then the section is read-only, with a large notice at the top.