You can change the layout of your blog at any time. For example, you may wish to remove the sidebar and have a single column layout.
To remove the sidebar, follow the steps below:
1. Go to the "Theme" section of your dashboard
2. Click the "Customize" button
3. Select the "Layout" section at the top of the screen
3. Select your desired layout from the options. The option shown with a red arrow below will remove the sidebar: