doc: README and new overview image

README.md

@@ -1,23 +1,35 @@
 [![License GPL 3][badge-license]](http://www.gnu.org/licenses/gpl-3.0.txt)
 
-Use Org-roam with markdown files by adding Md-roam to it.
-Md-roam extends the features and functions provided by [Org-roam](https://www.orgroam.com/) to support markdown files in addition to org files.
+Use [Org-roam](https://www.orgroam.com/) with Markdown files by adding Md-roam
+to it.  Md-roam extends the features and functions provided by Org-roam to
+support Markdown files. Mix Markdown with Org files in a single Org-roam database
+for your Zettelkasten-style note-taking and backlinks.
 
-![Screen shot showing main features of Org-roam supported by Md-roam](./images/2021-11-07-md-roam-overview.png)
+![Screen shot showing main features of Org-roam supported by Md-roam](./images/md-roam-v2-overview.png)
 
 1. Title and other meta data in the YAML front matter
-2. Specify notes for a reference material (literature notes / bibliographic notes) with `roam_refs:`
-3. #tag support to categorize notes
-4. Aliases of a note with `roam_aliases:`
-5. Link for backlinks with [[wiki-link]] syntax
-6. Citation with Pandoc style [@citekey], @citekey -@citekey, etc.
-7. Org-roam standard backlink buffer with Org mode (no modification to the database and backlink buffer)
+
+2. `#tag` support to categorize notes
+
+3. Specify notes as reference materials (literature notes / bibliographic notes) with `roam_refs:`
+
+4. Aliases of a note with `roam_aliases:` in the YAML array syntax with `["alias1", "alias two" ]`
+
+5. Link notes for backlinks with using `[[wiki-link]]` syntax and "in-line search" with `Company` or `Corfu`; the name is the **title** of a note
+
+6. Citations with Pandoc style `[@citekey]`, `@citekey` `-@citekey`, etc. for Markdown files; for Org, Org-ref or Org-cite styles as Org-roam support them
+
+7. Both Markdown and Org notes can cite a reference; they appear in the reflink section
+
+8. Create backlinks between Org and Markdown files both ways; you can mix both formats in a single Org-roam database
+
+9. Org-roam standard backlink buffer with no modification to the database schema and backlink buffer
 
 # License
 
 Md-Roam: Copyright © Noboru Ota
-
 Org-Roam: Copyright © Jethro Kuan and contributors.
+
 Distributed under the GNU General Public License, Version 3
 
 [org]: https://orgmode.org/