Update README

README.md

@@ -5,6 +5,8 @@ This is a simple Python script that displays whatever you're listening to in the
 [Clementine](https://www.clementine-player.org/) as your "Now Playing" status in 
 [Discord](https://discordapp.com/).
 
+![example](clementine_discord.png)
+
 Requirements
 ------------
 
@@ -25,6 +27,18 @@ Usage
 
 That's all there is to it.  It will quietly run in the background and update your status in Discord every 15 seconds.
 
+If you want to customize the exact string it puts in the details, edit the `DETAILS_STRING` variable at the top of
+`clementine_discord.py`.  You can substitute in any value that is returned in Clementine's metadata, although note that
+any colons (`:`) in the keys should be replaced with dashes (`-`).  You can run this command while Clementine is playing
+to see a list of values:
+```bash
+qdbus org.mpris.MediaPlayer2.clementine \
+    /org/mpris/MediaPlayer2 \
+    org.freedesktop.DBus.Properties.Get \
+    org.mpris.MediaPlayer2.Player \
+    Metadata
+```
+
 Questions?
 ----------