Until this point, all of our content additions and edits have been performed on a single page. However, it's likely that you will want to have certain blocks of content appear on multiple or all pages, such as a copyright notice in your page footer or an About the Author text snippet in the sidebar of all blog posts.
You add content to footers or sidebars using the Content Editor in much the same way as adding the page content. However, there are a few restrictions. Certain templates only allow certain types of blocks in footers or sidebars, and some templates have restrictions on positioning elements as well—for example, it's unlikely that you will be able to wrap text around an image in a sidebar due to space limitations.