diff --git a/docs/gateway-custom-themes.md b/docs/gateway-custom-themes.md
index 5e3d7c9..0405904 100644
--- a/docs/gateway-custom-themes.md
+++ b/docs/gateway-custom-themes.md
@@ -18,7 +18,7 @@
     ./themes/example/lennyface.png
     ./themes/example/style.css
     ```
-4. Copy the `themes/example` directory as `themes/<your-theme-name>` and edit it.
+4. Copy the `themes/example` directory as `themes/your_theme_name` and edit it.
 
 ## Testing your theme
 
@@ -29,7 +29,7 @@
    |----------------------------------------------------|----------------------------|
    | Override the default gateway URL                   | `ws://127.0.0.1:32842`     |
    | Override the default URL in QR code                | `http://127.0.0.1:32842/e` |
-   | Override theme name                                | `your-theme-name`          |
+   | Override theme name                                | `your_theme_name`          |
    | How would you like to sign the message             | _(whatever)_               |
    | Hex-encoded message to be signed with ECDSA/Keccak | _(whatever)_               |
 
@@ -38,3 +38,13 @@
 ## Deploying your theme to public Arx HaLo Gateway servers
 
 Feel free to create a Pull Request on [arx-research/halo-gateway-themes](https://github.com/arx-research/halo-gateway-themes) repository.
+
+## Using your theme
+
+Pass the `themeName` option when constructing `HaloGateway` object to instruct which theme should be used.
+
+```
+let gate = new HaloGateway('wss://s1.halo-gateway.arx.org', {
+    themeName: "your_theme_name"
+});
+```