Go to app launcher
Click the gear icon of the app you want to configure
Select the checkbox to enable the branding settings for this application
You can make changes here and those settings will override the org level settings
If you click on "Done," you will exit the Application settings. If you want to configure other options, you should do that before exiting
From here, you can add domains for the selected environments for this application
Like the Branding section, you have to select the checkbox to enable application-level widget settings
After configuring for Steps, click "Done" to save your settings