How can I set the Carousel/Showcase slider to show more slides?

You can learn more about the difference between the two slider type's behavior here.

Carousel

The amount of slides this slider type displays depends on the set slider size, slide size, minimum slide distance and maximum pane width. There's no way to set how many slides you want to display on different devices.

Example:

Set slider size 1200x500px 1200x500px 1200x500px
Slide size 400x400px 400x400px 250x400px
Minimum slide distance 0px 20px 10px
Maximum pane width 3000px 3000px 1200px
Browser width 1200px 1200px 1200px
Displayed slides 3 2 4

Basically, if you would like your slider to show more slides, you should increase the slider size, or reduce the slide size, slide distance or maximum pane width.

What happens on mobile/tablet?

The slider will display as many slides as can fit in the visible area. If 3 slides can fit in a tablet view, then 3 slides will display. If no more than 1 slide can fit, one slide will be shown. The same goes for mobile. Learn the general behavior of the slider type.

Showcase

The amount of slides this slider type displays depends on the set slider size, slide size, slide distance. There's no way to set how many slides you want to display on different devices.

Set slider size 1200x500px 1200x500px 1200x500px
Slide size 400x400px 250x400px 250x400px
Slide distance 60px 10px 10px
Visible slides 3 3 10
Browser width 1200px 1200px 1200px
Displayed slides 1 full, 2 partial 4 full, 1 partial 5 full, 2 partial

Basically, if you would like your slider to show more slides, you should increase the slider size or the visible slides, or reduce the slide size, or slide distance.

What happens on mobile/tablet?

That depends on your setup. If you set up your slider as the best responsive behavior suggests you'll probably see only one slide on mobile. Otherwise you'll probably see the next and previous slides next to the active slide.