Actually there are 3 sliders included to the theme package: Master Slider, Layer Slider and Revolution Slider. They comes with shortcodes which let you use them anywhere on a site. Notice, the top one (in the banner area) is placed with Page Layout Options. And the two bellow, are placed with shortcodes.
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Also, a regular WordPress gallery, can be a slider style, too.
This is dummy text of the Everything theme. A key concept of the theme options: most settings can be set globally, but you can additionally customize them for selected part of your site. For example: you can set a slider for the site, then you can set another one for all portfolios, and also set another one for a specific portfolio item. It’s very easily manageable and gives you a lot of customization power. This type of global/narrow customization is possible for such aspect of a site as: backgrounds, sliders, sidebars, footers, headlines etc.