在利用PPT演示文稿进行日常办公时，经常需要利用PPT幻灯片在规定的时间里完成演讲，那么用户该如何知道自己的演讲花费了多久的时间呢，今天小编就来教大家PPT的演讲计时功能，可以看出总PPT放映时常和单张演讲时长，并且放映时按照排练时间进行自动放映，一起来学习一下吧。
首先，单击工具栏【幻灯片放映】下的【排练计时】，在下拉菜单下选择排练全部：
进入幻灯片放映模式，可以看到左上角有一个预演计时框，如下图所示：
此预演对话框左边显示为单张幻灯片计时为5秒，右边显示总幻灯片放映时长为18秒，如下图所示：
当幻灯片模拟排练计时完毕后，单击键盘快捷键Esc，弹出是否保存幻灯片排练时间的对话框，单击是即可：
那么，在PPT演示文稿当中，设置幻灯片演示计时的方法，是不是非常简单呢，你学会了吗？
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