Sidebar Content
Page layouts that use the left navigation or top navigation with right sidebar can make use of the sidebar content types.
Setting up the sidebar
From the action menu of your homepage section (the one at the top of your hierarchy) create a new section.
Name the section either
left_sidebar
or
right_sidebar
Uncheck 'Show in navigation'.
Save changes
Content types that work in the sidebar
Multiple Sidebars
Sidebars are a recursive feature. Meaning that the page layout will look up and down the site structure to find a sidebar section. If you want a certain section to have a different sidebar than the other sections in your site, simply create a sidebar section directly underneath it. The page layout looks for the sidebar that is directly under a section. Then it looks up and down the structure to find one.