Step One: From the top of your Dashboard at the top of the screen, under Your Public Portal you can choose co-branding using the second dropdown menu.
Step Two: In order to change your portal (the background image for your app) click on the gear icon in the bottom left corner of the screen.
***NOTE*** In order to edit your Portal Background you must be able to access the Company Settings.
Step Three: Click on Settings.
Step Four: A box will pop up prompting you to choose either Personal Settings or Company Settings, choose Company Settings.
Step Five: On the left side of the screen, under Company Config, click Company Config.
Step Six: Scroll to the bottom of the page, under Portal Background click Upload Background. Clicking Upload Background will bring you to a file explorer, simply locate your chosen file and click Open.
Step Seven: In the bottom right corner of the screen, click Save.
You can now update your Portal Background!