smartboard乘法游戏。点击“绘制”将弹出以下选项。组合:将工作区中选择的多个独立对象组合成一个组对象。Ungroup:将组合的组对象分解为多个独立的对象。排序:放在最上面:把选定的对象层放在所有层上。把选定的对象层放在所有层的下面。上移一级:将选中的对象层移动到上一层。向下移动一层:将选定的对象层移动到下一层之下。制作背景:所选对象层被放置在底部，不能被编辑。检索背景:将当前页面的背景恢复为可重新编辑的状态。笔:将电子笔转换为笔刷功能，在工作区域绘制轨迹。 Highlighter: The electronic pen converts to the highlighter function and draws a translucent track in the workspace. Eraser: The electronic pen converts to a wiper function that erases the trajectory of the pen or highlighter. Rectangle: Click to draw a rectangle in the workspace. Ellipse: Click this to draw an ellipse in the workspace. Line: Click to draw a line in the workspace. Text: Click this to edit the text in the workspace.