diff --git a/docs/todo/core.md b/docs/todo/core.md
index 4644a13..c6b5273 100644
--- a/docs/todo/core.md
+++ b/docs/todo/core.md
@@ -1,6 +1,7 @@
 # @idraw/core
 
 * [] Reset board's size
+* [] Keep two decimals
 * [x] Scale canvas
 * [x] Scroll canvas
 * [x] Render by requestAnimateFrame