When submitting PR application, do you staple the forms?

Applying for permanen residency soon, and I saw the memo about printing all forms "one side" and not back to back. For these multiple pages, should I staple them or put them in a folder case? I know I'm just overthinking but wouldn't hurt to ask I guess. Thank you!

Also do you submit them in just one envelope? or can I put them in multiple clear cases per section?

by clivesplice