Welcome. This is your first post. Edit or delete it, then start blogging!
This Sidebar2 only appears if you put widgets in it. See what happens to the two sidebars below when you resize your browser window.
Try this page on your Smart Phone. On android, iPad or iPhone? It should scale. or just resize your browser to simulate
This is the sidebar 3. Add some widgets to this space.
Check out below the Show Posts widget bundled with the Xi theme: