Of course, the following is a rewritten version based on the original content you provided, retaining the HTML and image address information, and removing the video tag because it is no longer needed in the text description: ```html
< article class="course-detail-description-content" style="display:;">
When faced with a specific screening environment, if the conventional slide size cannot meet If required, we can customize the size of PPT through the following steps.
First, open the slide you want to resize, click the "Design" menu bar above, and select the "Slide Size" option.
Here, you can preset a regular screen ratio, such as 4:3 or 16:9, or select "Custom size" to manually set the width and height of your slides to suit your presentation needs.
This way you can easily resize your slides to perfectly fit different presentation environments.
```Please note that I have removed the video element `
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