The document tree displays the entity (patient, provider, staff member, employer, referral, or insurance), the document types that are in use for that entity, and the documents that are associated with each of those types. The plus (+) or minus (-) sign next a document type folder indicates whether it is expanded or collapsed. Click the plus sign to view the contents of the document type folder. Click the minus sign to hide the contents of the document type folder. The document tree is where you will select documents to preview, edit, print, and so forth.