Slider Width too big

I’m trying to use Slide Anything to create a testimonial block. I created a sample slider but when I insert it into a layout, it is formatted with a width of 26000px and a height over 4000px.

I don’t see any way to control or set the width of the slider in the settings. I can create custom CSS but I’d rather not. How do you set the width of the slider?

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