diff --git a/docs/guide/theme-nav.md b/docs/guide/theme-nav.md
index d86dcd00..55f7e41d 100644
--- a/docs/guide/theme-nav.md
+++ b/docs/guide/theme-nav.md
@@ -35,6 +35,8 @@ export default {
 }
 ```
 
+You can also pass an object as logo if you want to add `alt` attribute or customize it based on dark/light mode. Refer [`themeConfig.logo`](../config/theme-configs#logo) for details.
+
 ## Navigation Links
 
 You may define `themeConfig.nav` option to add links to your nav.