diff --git a/docs/todo/board.md b/docs/todo/board.md
index 4fa5809..919e8f8 100644
--- a/docs/todo/board.md
+++ b/docs/todo/board.md
@@ -1,5 +1,3 @@
 # @idraw/board
 
-## Testing
-
-* [] 
\ No newline at end of file
+* [] Reset board's size
\ No newline at end of file
diff --git a/docs/todo/core.md b/docs/todo/core.md
index 58071d6..4644a13 100644
--- a/docs/todo/core.md
+++ b/docs/todo/core.md
@@ -1,5 +1,6 @@
 # @idraw/core
 
+* [] Reset board's size
 * [x] Scale canvas
 * [x] Scroll canvas
 * [x] Render by requestAnimateFrame