Whenever I put up a powerpoint slideshow, it takes of at rapid speed. I've tried setting duration in powerpoint, tried slide show settings in vMix. The only thing that has worked is making 10 or so copies of the first slide, so I can put it up and pause it before it takes off. But if I want to go away and come back to some place in the middle of the show, it takes off again. It's really frustrating.

So you're using display capture rather than loading the PPT into vMix?

I don't want to use a presenter for various reasons. So I put the shortcuts on the keyboard. But it still takes off. And it moves forward on its own. Really frustrating.

Open the Slide Show Settings. Set the duration to "0"

IF I simply put PPT on screen, no problem. However, as part of multi-view, it advances uncontrollably. Multiview has camera input (me) in front; background image in the background, and PPT slides in between.

Same result.

OK This is not what you originally reported. However, the solution is the same.

Try this.

Open a new blank profile.
Open a Powerpoint input
Open Slide show settings and set to "0" Close and save settings. (Click the top right "x" button on the settings window)
Create a shortcut using "NextItem" to advance the slides. Set the source as Preview.
Open a Camera Input
Open a blank input.
Open the Settings page. Select Multiview and choose a side by side template. Select the Camera as Overlay 1 and PPoint as Overlay 2.
Put the Blank input into Program and the PPoint into Preview.
Open the shortcut panel and test....

Alternatively point the shortcut directly at you PPoint input. I use up to 15 different PPoint presentations so find it easier to do the above.

I also UNTICK Automatically Mix Audio, Restart on Transition and Play with Transition