A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
As part of striving for parity between Office for Mac & Office for Windows Microsoft has been changing some of the keyboard shortcuts previously used in the Mac version. Unfortunately, this is being done without much documentation or notification, nor does there seem to be any coordination between the respective development teams. In fact, the PowerPoint Help for keyboard shortcuts doesn't even mention the assignments for subscript & superscript.
Instead of Command use the Control key:
- Shift+Control+= for superscript
- Control+= for subscript
If you continue to have a problem pleas be sure to include the Version & type of License for your Office installation which can be obtained from PowerPoint> About PowerPoint (or the equivalent in either of the Office programs).