
Add or delete audio in your PowerPoint presentation - Microsoft Support
You can add audio, such as music, narration, or sound bites, to your PowerPoint presentation. When adding audio, you can also specify when the audio should start and how long it should run.
Turn off or delete narration in a presentation - Microsoft Support
To prevent narration from playing on a slide, you can either turn it off or permanently delete it.
Trim a video, music clip, or sound clip in PowerPoint
In video or audio that you've added to a PowerPoint slide, you can trim away unwanted content at the beginning or end of the clip, or both. You can only trim videos that you've inserted from your computer.
Play music across multiple slides in your slide show in PowerPoint
You can add a song to a presentation and play it across slides in the background of your slide show. If you want to use music from the web, you have to download it to your computer before you can use it …
Turn formatting marks on or off in Outlook - Microsoft Support
When composing an email message, you might see some symbols within your text. These are actually formatting marks, such as dots (for spaces) or arrows (for tab characters) in Outlook. Formatting …
Play music or other sounds automatically when a slide appears
You can tell PowerPoint to play music or other audio automatically when a certain slide appears during a slide show. There are different ways to play it automatically when you get to that slide in your …
Change, remove, or turn off animation effects in PowerPoint
Learn how to replace or remove animations applied to objects in a PowerPoint presentation.
Insert or change the slide numbers, date, or footer for on-screen ...
Select Apply to All to remove the footer from all slides in the presentation. Otherwise, select Apply to only remove the footer from the currently selected slide.
How to mute, separate, and delete audio from video
Once detached, click on the audio asset on the timeline then click the delete button. This will remove it from the timeline and when you export the video, it will not contain sound.
Remove the background of a picture in Office - Microsoft Support
Learn how to remove the background from a picture in a Microsoft Office file. Use the automatic background removal or draw lines to indicate the areas to keep and remove.