How do I change the theme of a specific slide?
Apply a different theme to a slide
Select the slide that you want to apply a different theme to. Hold down CONTROL and then, on the Themes tab, under Themes, click the slide that you want to apply the theme to, and click Apply to Selected Slides.
How do I change the template on an existing PowerPoint presentation?
Select File > New from Template. The PowerPoint Presentation Gallery opens. On the left, under Templates or Themes, click All. If you don't have existing slides to add to the new presentation, simply begin creating slides in your new file.
How can we change the background of a slide in a presentation?
Related Question how to change slide theme in powerpoint
How do I enable editing in PowerPoint 2020?
How do you edit text in PowerPoint?
How do you customize a slide layout?
How do you unlock slides in PowerPoint?
Locked shapes, objects, images or tables in your PowerPoint presentation can be unlocked using PPT Productivity. Select the slide/s containing locked shape(s) you need to unlock, then click 'Unlock objects' (Found beneath the Lock Object icon on the PPT Productivity Ribbon).
Why can't I edit in OneDrive?
If the issue persists, you may try the following steps: Open the Word client and go to File -> Options. Select Trust Center Settings in the Trust Center tab. Untick all the options in the Protected View tab.