Draws a line that ends in a rectangular callout with horizontal text direction from where you drag in the current document. Drag a handle of the callout to resize the callout. To add text, click the edge of the callout, and then type or paste your text. To change a rectangular callout to a rounded callout, drag the largest corner handle when the pointer changes to a hand.
在当前文档中，从拖动的位置开始到矩形标注（其文本方向为水平方向）为止绘制一条线条。拖动标注的控点可以修改标注的大小。要添加文本，请单击标注的边缘，然后键入或粘贴文本。要将矩形标注修改为圆角标注，请在指针变为手形时拖动最大的角控点。