The Trash Bin keeps all your deleted documents, folders, and pages until they are manually recovered, moved, or deleted permanently.
Trash Bin
.Once the Trash Bin is in view, you can do any of the following:
Tap any of the options in the top-center:
Tap its thumbnail, or the small down arrow next to it.
Choose Recover
.
The item will be put back to the original folder/notebook where it was removed.
Delete Permanently
.Empty
near the top-right corner and confirm.