To change the position of any page element, simply click on the widget you’d like to move and drag and drop it where you want it to show. Most common locations are the sidebar, the footer of your blog or below / above the blog posts.
Note: some page elements are locked in order to prevent display problems (i.e. Pages gadget or the Blog Posts section)
After the gadgets/page elements have been rearranged, don’t forget to click on the Save button located on the bottom right side of the page.