diff --git a/doc/advanced/config-cheat-sheet.en-us.md b/doc/advanced/config-cheat-sheet.en-us.md
index e2a2687f..07655a18 100644
--- a/doc/advanced/config-cheat-sheet.en-us.md
+++ b/doc/advanced/config-cheat-sheet.en-us.md
@@ -710,6 +710,7 @@ Define allowed algorithms and their minimum key length (use -1 to disable a type
 - `AVATAR_MAX_WIDTH`: **4096**: Maximum avatar image width in pixels.
 - `AVATAR_MAX_HEIGHT`: **3072**: Maximum avatar image height in pixels.
 - `AVATAR_MAX_FILE_SIZE`: **1048576** (1Mb): Maximum avatar image file size in bytes.
+- `AVATAR_RENDERED_SIZE_FACTOR`: **3**: The multiplication factor for rendered avatar images. Larger values result in finer rendering on HiDPI devices.
 
 - `REPOSITORY_AVATAR_STORAGE_TYPE`: **default**: Storage type defined in `[storage.xxx]`. Default is `default` which will read `[storage]` if no section `[storage]` will be a type `local`.
 - `REPOSITORY_AVATAR_UPLOAD_PATH`: **data/repo-avatars**: Path to store repository avatar image files.