Using a laser pointer is a great way to focus the audience on a specific part of your presentation. If you don’t happen to have one on hand at the time of your presentation, then you can use PowerPoint’s neat little setting to turn your mouse into a laser pointer. Here’s how.
使用激光笔是一种使观众集中于演示文稿特定部分的好方法。 如果在演示时碰巧没有一只手,则可以使用PowerPoint的简洁设置将鼠标变成激光指示器。 这是如何做。

将鼠标变成激光笔(Turning Your Mouse into a Laser Pointer)

Microsoft came to the rescue with its PowerPoint 2010 release, getting presenters who forgot their laser pointer out of a pinch by providing a feature that converts the mouse into a laser pointer.
微软在其PowerPoint 2010版本中进行了抢救,通过提供将鼠标转换为激光指示器的功能,使演示者毫不费力地忘记了激光指示器。
Enabling this feature is quite simple. In fact, you can do it during the actual presentation.
启用此功能非常简单。 实际上,您可以在实际演示过程中做到这一点。
Once you’ve started your presentation and you want to change your cursor into a laser, press and hold the “Ctrl” key while clicking and holding the left mouse button.
开始演示后,要将光标更改为激光,请按住“ Ctrl”键,同时单击并按住鼠标左键。