2.3 Pages
Except the standard WordPress settings for posts, there's also Layouts option box
You can select page layout - left sidebar, right sidebar, or full-width post, and assign which Sidebar to display on this post view. You can create custom sidebars in Appearance -> Theme Options
Slider Settings
If you'll change Page Template in Page Attributes box to Page Template with HoloSlider you can choose in select box below which slider you want to display