diff --git a/docs/intro.rst b/docs/intro.rst
index 9d8533c8..ae5141b0 100644
--- a/docs/intro.rst
+++ b/docs/intro.rst
@@ -64,82 +64,88 @@ Below are the supported features for each file formats.
 Writers
 ~~~~~~~
 
-+------+-----------------+--------+-------+-------+
-| No   | Element         | DOCX   | ODT   | RTF   |
-+======+=================+========+=======+=======+
-| 1    | Text            | v      | v     | v     |
-+------+-----------------+--------+-------+-------+
-| 2    | Text Run        | v      | v     | v     |
-+------+-----------------+--------+-------+-------+
-| 3    | Title           | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 4    | Link            | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 5    | Preserve Text   | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 6    | Text Break      | v      | v     | v     |
-+------+-----------------+--------+-------+-------+
-| 7    | Page Break      | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 8    | List            | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 9    | Table           | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 10   | Image           | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 11   | MemoryImage     | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 12   | Object          | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 13   | Watermark       | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 14   | TOC             | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 15   | Header          | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 16   | Footer          | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 17   | Footnote        | v      |       |       |
-+------+-----------------+--------+-------+-------+
++----------------------------------------+--------+-------+-------+
+| Features                               | DOCX   | ODT   | RTF   |
++=========================+==============+========+=======+=======+
+| **Document Properties** | Standard     |        |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Extended     |        |       |       |
++                         +--------------+--------+-------+-------+
+|                         | UserDefined  |        |       |       |
++-------------------------+--------------+--------+-------+-------+
+| **Element Type**        | Text         | ✓      | ✓     | ✓     |
++                         +--------------+--------+-------+-------+
+|                         | Text Run     | ✓      | ✓     | ✓     |
++                         +--------------+--------+-------+-------+
+|                         | Title        | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Link         | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Preserve Text| ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Text Break   | ✓      | ✓     | ✓     |
++                         +--------------+--------+-------+-------+
+|                         | Page Break   | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | List         | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Table        | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Image        | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | MemoryImage  | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Object       | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Watermark    | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | TOC          | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Header       | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Footer       | ✓      |       |       |
++                         +--------------+--------+-------+-------+
+|                         | Footnote     | ✓      |       |       |
++-------------------------+--------------+--------+-------+-------+
+
 
 Readers
 ~~~~~~~
 
-+------+-----------------+--------+-------+-------+
-| No   | Element         | DOCX   | ODT   | RTF   |
-+======+=================+========+=======+=======+
-| 1    | Text            | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 2    | Text Run        | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 3    | Title           |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 4    | Link            |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 5    | Preserve Text   |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 6    | Text Break      | v      |       |       |
-+------+-----------------+--------+-------+-------+
-| 7    | Page Break      |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 8    | List            |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 9    | Table           |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 10   | Image           |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 11   | MemoryImage     |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 12   | Object          |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 13   | Watermark       |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 14   | TOC             |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 15   | Header          |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 16   | Footer          |        |       |       |
-+------+-----------------+--------+-------+-------+
-| 17   | Footnote        |        |       |       |
-+------+-----------------+--------+-------+-------+
-
++-----------------+--------+-------+-------+
+| Element         | DOCX   | ODT   | RTF   |
++=================+========+=======+=======+
+| Text            | ✓      |       |       |
++-----------------+--------+-------+-------+
+| Text Run        | ✓      |       |       |
++-----------------+--------+-------+-------+
+| Title           |        |       |       |
++-----------------+--------+-------+-------+
+| Link            |        |       |       |
++-----------------+--------+-------+-------+
+| Preserve Text   |        |       |       |
++-----------------+--------+-------+-------+
+| Text Break      | ✓      |       |       |
++-----------------+--------+-------+-------+
+| Page Break      |        |       |       |
++-----------------+--------+-------+-------+
+| List            |        |       |       |
++-----------------+--------+-------+-------+
+| Table           |        |       |       |
++-----------------+--------+-------+-------+
+| Image           |        |       |       |
++-----------------+--------+-------+-------+
+| MemoryImage     |        |       |       |
++-----------------+--------+-------+-------+
+| Object          |        |       |       |
++-----------------+--------+-------+-------+
+| Watermark       |        |       |       |
++-----------------+--------+-------+-------+
+| TOC             |        |       |       |
++-----------------+--------+-------+-------+
+| Header          |        |       |       |
++-----------------+--------+-------+-------+
+| Footer          |        |       |       |
++-----------------+--------+-------+-------+
+| Footnote        |        |       |       |
++-----------------+--------+-------+-------+