diff --git a/README.md b/README.md
index a398ad6..46f547b 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,9 @@ Invert the pixel color at (**x**;**y**).
 Invert all the pixels of the rectangle from (**x**;**y**) of size **w** (width)
 times **h** (height).
 
+`store_rect(x: int, y: int, w:int, h: int) -> SpriteRaw` :
+Store all the pixels of the given area in a `SpriteRaw`.
+
 ## Sprite classes (WIP)
 `SpriteIndexed` : indexed sprite. Draw using pallets.