Clarify setting.

Author: mattstein

README.md

@@ -10,13 +10,15 @@ Download the `.alfredworkflow` file from the [latest release](https://github.com
 
 ## Configuration
 
-You need to configure an environment variable with your project folder paths. You can add however many you’d like, and it’ll work fine if you use Alfred on different machines and add paths relevant to each one.
+You need to configure an environment variable with your project folder paths, which should be a comma-separated list of directories that contain your project folders.
+
+You can add however many you’d like, and it’ll work fine if you use Alfred on different machines and add paths relevant to each one.
 
 Set this from the **Workflows** settings, clicking **Quick Open Project**, then the **[x]** at the top right, and clicking the **Environment Variables** tab.
 
 | Variable            | Default | Required? | Note |
 |---------------------| --- | --- | --- |
-| `SEARCH_PATHS`      |  | ✅ |  |
+| `SEARCH_PATHS`      |  | ✅ | Example: `~/dev,~/Documents/Projects` |
 
 ## Usage