PowerPoint supports two different methods for changing the capitalization of text you've entered in your presentation. Depending on what's easiest for you, you can change the capitalization using keyboard shortcuts or you can change the capitalization using a command in the Font group of the Home tab.
Microsoft PowerPoint – Convert Text to Sentence Case
Keyboard shortcuts are useful in almost any program as a quick alternative to using the mouse. PowerPoint supports the Shift+F3 shortcut in Windows (which is the same in Word) to toggle between the three most common selections for changing text:
Highlight the text you want to change and press Shift+F3 to toggle between settings.
If you don't use keyboard shortcuts or are using PowerPoint on a Mac, you can change the capitalization of text in a presentation from the PowerPoint ribbon.
