Option to Customize the Designer Page

There should be an option to change certain things on the Designer Page, as with the other webpages. For example, it would be great to add a little side bar on the page that had contact information in case a customer got stuck and needed help. We currently have the option to edit the popup that appears at the beginning when the load the designer page, but that's really just a bit too small. There needs to be something bigger and more custom friendly.