diff --git a/website/src/docs/guides/local-source/index.md b/website/src/docs/guides/local-source/index.md
index e4fed93e..db7d579d 100644
--- a/website/src/docs/guides/local-source/index.md
+++ b/website/src/docs/guides/local-source/index.md
@@ -24,9 +24,11 @@ This page explores some advanced features.
 
 If you add more chapters then you'll have to manually refresh the chapter list (by pulling down the list).
 
-Supported chapter formats are folders with pictures inside (such as `.jpg`, `.png`, etc), `ZIP`/`CBZ`, `RAR`/`CBR` and `EPUB`.
+Supported chapter formats are folders with pictures inside (such as `.jpg`, `.png`, etc) or archive files (`ZIP`/`CBZ`, `RAR`/`CBR`, and `EPUB`).
 But expect better performance with directories and `ZIP`/`CBZ`.
 
+Note that a single folder or archive file is treated as a single chapter. For example, Tachiyomi will not automatically split an `EPUB` file containing multiple chapters into separate chapters within the app.
+
 Remember to give the app storage permissions on **Android 6** and newer.
 
 ### Folder structure