diff --git a/UI/ObjectClass/Canvas.nut b/UI/ObjectClass/Canvas.nut
index e783ba7..1e90ec8 100644
--- a/UI/ObjectClass/Canvas.nut
+++ b/UI/ObjectClass/Canvas.nut
@@ -14,11 +14,31 @@ class Canvas extends Actor {
         sq_RegisterDestruction(C_Object, this);
     }
 
+    /**
+     * 绘制Img
+     * @function
+     * @param {string} Img img路径
+     * @param {integer} Index img编号
+     * @param {integer} X X坐标
+     * @param {integer} Y Y坐标
+     * @returns {void}
+     */
     function DrawImg(Img, Index, X, Y) {
-        sq_Canvas_DrawImg(C_Object, Img, Index, {x = X, y = Y});
+        sq_Canvas_DrawImg(C_Object, Img, Index, { x = X, y = Y });
     }
 
+    /**
+     * 根据矩形绘制Img
+     * @function
+     * @param {string} Img img路径
+     * @param {integer} Index img编号
+     * @param {integer} X X坐标
+     * @param {integer} Y Y坐标
+     * @param {any} Width 宽度
+     * @param {any} Height 高度
+     * @returns {void}
+     */
     function DrawImgRect(Img, Index, X, Y, Width, Height) {
-        sq_Canvas_DrawImgRect(C_Object, Img, Index, {x = X, y = Y,w = Width, h = Height});
+        sq_Canvas_DrawImgRect(C_Object, Img, Index, { x = X, y = Y, w = Width, h = Height });
     }
 }