When a client requests a change to their channel, the process couldn't be easier. Login to your Momento account, click the dropdown menu to the right of the channel, and select "Edit Channel."
Edit any section (Basic, Theme, Logo, Photos, or Sharing), and click save.
Bonus Tip: If you edited your channel after setting up your booth, you need to perform a refresh of the app on screen. With the Momento app open on your iPad, simply triple-tap on the bottom left corner of your iPad. The channel picker will reappear. Select the same channel, and tap the "Choose It" button. This will refresh your application and push any changes you made.
(Disclaimer: You must have an internet connection to perform this action)