How to Fix PowerPoint Animations Not Playing Correctly in Slideshow Mode
Question details
The user needs to fix presentation animations that fail to play, trigger in the wrong order, or have incorrect timing during the actual slideshow.

- Product
- PowerPoint
- Device & OS
- not provided
- Scenario
- Playing a presentation saved as a PPSX file that includes a video used as a slide background.
- Observed behavior
- Animations function correctly when previewed in the Animation Pane but fail or play out of order when running the slideshow.
Before troubleshooting, open your PowerPoint application and use the 'Open' menu to load your PPSX file, then save a backup copy as a standard PPTX file so you can easily edit the slide settings.
Configure Animation Start and Timing Settings
Ensure each animation triggers correctly by reviewing the specific 'Start' option in the Animation Pane to fix sequencing errors.
Animations that appear in the wrong order during playback are usually caused by conflicting start triggers. Manually defining how and when each animation begins will resolve sequencing issues.
Navigate to the 'Animations' tab on the top ribbon and click on 'Animation Pane' to view the list of all applied animations on your current slide.
Click on an animation in the pane. In the 'Timing' group on the ribbon, check the 'Start' dropdown menu.
Choose 'On Click' if you want it to wait for your manual click, 'With Previous' to play simultaneously with the previous effect, or 'After Previous' to play sequentially.
Reorder the animations by dragging them up or down in the Animation Pane, then click 'Play All' to verify the timing is correct before entering full slideshow mode.

Optimize Background Video Settings
Heavy or unsupported video backgrounds can disrupt animation playback and cause lag in slideshow mode.
Test the Presentation on Another Device
Determine if the slideshow issue is tied to the specific file or if it's caused by the local computer's processing hardware.
Fix Animation Timings Easily with WPS Presentation
WPS Presentation is a powerful and free tool that seamlessly handles PPTX and PPSX files. You can effortlessly adjust complex animation timings, manage video backgrounds, and ensure smooth slideshow playback without lag or glitches.
- 1. Open Your File in WPS: Launch WPS Office Presentation and open your PPTX or PPSX file.
- 2. Access the Animation Pane: Click on the 'Animation' tab in the top menu and select 'Custom Animation' to open the control pane on the right.
- 3. Adjust Start Triggers: Right-click any problematic animation in the list and change its start behavior to 'Start On Click', 'Start With Previous', or 'Start After Previous'.
- 4. Play the Slideshow: Click the 'Play' button at the bottom of the screen or press F5 to preview your smoothly running animations.

Frequently Asked Questions
Why do my PowerPoint animations work in the preview but not in the slideshow?
This often happens because animations are defaulted to trigger 'On Click' instead of 'With Previous' or 'After Previous'. While the preview forces all animations to play, the actual slideshow pauses and waits for your manual mouse click before proceeding.
What is a PPSX file and how does it affect animations?
A PPSX file is a PowerPoint Show file designed to open directly into slideshow playback mode rather than edit mode. If animation timings are misconfigured in the original file, the sequencing errors will be immediately visible upon launching the PPSX.
Can a large video background cause my slide animations to lag?
Yes, inserting heavy, high-resolution, or unsupported video formats can consume significant system resources. This causes the presentation engine to struggle, leading to animation lag, freezing, or out-of-order playback during the slideshow.
How do I change a PPSX file back to a PPTX to edit the animations?
You cannot simply rename the extension to edit it properly. Open your presentation software first, navigate to File > Open, and select your PPSX file. Once it opens in edit mode, go to File > Save As and select PPTX as the file format.




