With the new upgrade to Essentials files, we have had clients have issues with their full width header image not actually showing as full width. It has been very complicated to try to fix it. Also since they needed more information in their header, the option to choose logo and business details doesn't work. It would be good to make header image option easier to fit to the same margins as the invoice content, or have the option to add more information on multiple lines under the logo and business details option.
"Invoice Templates - more flexibility"