Compress media to decrease file size
To set the relative volume of a video soundtrack 1. Select the video. 2. On the Playback tool tab, in the Video Options group, click the Volume button. 3. In the Volume list, click Low , Medium , High , or Mute . Compress media to decrease file size Trimming an audio or video clip affects only the playback of the media on the slide, not the original media clip. The original media clip is stored in its entirety as part of the presentation, and you can re-trim or restore the media clip at any time. You can decrease the size of a PowerPoint file that contains trimmed media clips by discarding the unused portions of the clips. PowerPoint 2016 offers three compression configurations designed to balance size and quality.
Choose the size and quality that best fits your needs
When you save and close the file after compressing the media, the trimmed portions of the videos are discarded and no longer available. You can reverse the compression operation until you save and close the file.
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