I want to keep some documents in case I need them later, do I have to delete them?

You can archive your documents by selecting the box with an arrow icon in the document tracking section.

This allows you to archive a document you are not using without deleting it.

You can also restore an archived document, under the “Archived Documents” tab by locating the document you wish to restore and selecting the backwards clock icon under the "Actions" column. The document will then be moved back to your list of Current documents.