This is another PowerPoint how-to that was originally posted over a decade ago! You can jump back to 2012 with PowerPoint animation how-to tip. Today we see the same animation error in presentations, so this qualifies as a past, but still relevant blog post! As an addition, Amber on the TLC Creative design team, updated the PowerPoint app screen captures, from the original post, to show the current icons, and added a nice, animated gif showing the animation issue created when applying text animation to the shape and not the actual text.
Have you run into the issue of during the slide show an animated bullet list of text has the text shadow visible and then the full text animates on top of the shadow? It is a scenario that started with PPT 2007. The good news is, it is not a bug in the program and it is easy to “fix.”
Scenario
You have shadow effects on your text and a great on-click animation.

But when you view as a slide show, the shadow of the text is there before the animation! Click and the text animates on as expected – but how come the shadow was not part of the animation?

To Fix
1. Select the text box.
2. Go to FORMAT >> SHAPE EFFECTS >> SHADOW and change the selection to NO SHADOW.

3. With the text box still selected, go to FORMAT >> TEXT EFFECTS >> SHADOW and choose the shadow style needed.

4. Now when you run as a slideshow everything appears when animated!
Why
PowerPoint has always had two types of shadows: Shape and Text shadows. Way back in PPT 2003, there was really no visual difference between them (at the code level, the two shadow types were different, but when animating they just worked). Starting with PPT 2007, the difference between the two shadows types made a difference in how things are displayed. The non-animating text shadow is a most common way this shows up. Because it is a text animation, the shape shadow (even though it looks like text, if the shadow styling is applied as a Shape effect, it is a shape) has no animation applied to it.
– Troy @ TLC
This is from our Look Back series rediscovering previous blog posts with relevant PowerPoint Tips, Tricks and Examples. Original April 2, 2012 blog post here.