Add an additional Scrapyard, which can be called Storage.

Here you can store all the strips that you may or may not ever need to use but also don't want to be printed when exporting with the Scrapyard visible.

It may sound like a niche use case but I somehow end up needing it in many projects and currently hack it by using multiple duplicates of the main file, which as we all know, can get tedious and messy.