diff --git a/Configuration.md b/Configuration.md
index 53f57c3..dc35037 100644
--- a/Configuration.md
+++ b/Configuration.md
@@ -15,6 +15,9 @@ env CHROME_BINARY=google-chrome-stable RESOLUTION=1440,900 FETCH_PDF=False ./arc
 
 As defined in [`archivebox/config.py`](https://github.com/pirate/ArchiveBox/blob/master/archivebox/config.py) and [`etc/ArchiveBox.conf.default`](https://github.com/pirate/ArchiveBox/blob/master/etc/ArchiveBox.conf.default).
 
+*Documentation format:(
+ - description of setting: `ENVIRONMENT_VARIABLE_NAME`: [`default value`]/`example value`/...
+
 ### Shell Options
  - colorize console ouput: `USE_COLOR` value: [`True`]/`False`
  - show progress bar: `SHOW_PROGRESS` value: [`True`]/`False`