Tap the blue "App" text box in the action and choose the app that corresponds to the dark mode icon we created above. Credit: Khamosh Pathak Now, tap the down-arrow button from the top, and choose ...

Editing the text lets you write in a new name, whether it’s the official title of the app or a new (or old) one you prefer. Tapping the icon lets you replace it with the image of your choosing.