I am having the same problem as this question here: Tab key in Microsoft Word does not increase indent in bullet lists. But the answer provided doesn't seem to work in Powerpoint 2010 anymore. This is the option list that I found, but I can't find the option needed:
2 Answers
PowerPoint behaves the way you'd expect it to re bullets and tabs when you're entering text into a body text placeholder, but not when you're entering text into a regular text shape or other shape.
If it's not a text placeholder, use the Increase List Level and Decrease List Level buttons on the Paragraph group of the Home tab instead of using the tab key.
1I found that when I use themes, sometimes I experience this and other strange behavior with bulleted lists. What I do when I encounter this problem is just delete the text box and then insert a new one. It works every time.
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