I have noticed that, when using the native Equation tools functionality (which has replaced the old Equation Editor) that some of the structures are not allowed in Powerpoint 2013, and specifically they get changed to their more compact counterparts. This is true of the full-size "Stacked Fraction," which gets changed to the "Compact Fraction" with no way that I can find to make it a "Stacked Fraction." This also happens with the limits on summation symbols and integral signs, it automatically changes the forms with the limits above/below the symbol to the forms where the limits follow the symbol. All of the structures work properly in Word, it is just in Powerpoint that they do this. Even taking an equation created in Word and pasting it into Powerpoint will change the formatting of the structures.
Anyone have any ideas how to get Powerpoint to quit doing this? And and all help would be greatly appreciated.
P.S. I have tried using MathType, but I don't like the spacing and line weights quite as well as the native tool, and I also greatly prefer the ability to make the equations in-line with text, as opposed to a stand-alone object as with MathType.
Best Answer
This is an old question, but still valid.
I found out that the problem is related to Display and Inline modes of the equations, and it is the same feature also in Word. When there is any text (even a space) at the same line with the equation, the equation is automatically changed to Inline mode, which shrinks the size of the equation vertically. It is not possible to change this behaviour (that I would call a bug, but of course Microsoft considers it a feature since they do not want to put any effort on developing less used functionalities like Equation editor in general).
However, there is a workaround that can be used quite nicely in Powerpoint, and why not also in Word, although it requires more effort:
The equation can be placed in a separate text box, that includes nothing else. Then this text box can be placed on top of the desired text, where you just leave an empty space for the equation.