documentation

docs/usage_overview.rst

@@ -60,6 +60,31 @@ Once you've got Paperless setup, you need to start feeding documents into it.
 Currently, there are three options: the consumption directory, IMAP (email), and
 HTTP POST.
 
+When adding documents to paperless, it will perform the following operations on
+your documents:
+
+1.  OCR the document, if it has no text. Digital documents usually have text,
+    and this step will be skipped for those documents.
+2.  Paperless will create an archiveable PDF/A document from your document.
+    If this document is coming from your scanner, it will have embedded selectable text.
+3.  Paperless performs automatic matching of tags, correspondents and types on the
+    document before storing it in the database.
+
+.. hint::
+
+    This process can be configured to fit your needs. If you don't want paperless
+    to create archived versions for digital documents, you can configure that by
+    configuring ``PAPERLESS_OCR_MODE=skip_noarchive``. Please read the 
+    :ref:`relevant section in the documentation <configuration-ocr>`.
+
+.. note::
+
+    No matter which options you choose, Paperless will always store the original
+    document that it found in the consumption directory or in the mail and
+    will never overwrite that document. Archived versions are stored alongside the
+    digital versions.
+
+
 
 The consumption directory
 =========================