Goal: I want to read my book in dark mode, so change the theme to dark mode on the Google Play Books app.
Steps:
action: action_type: click
step_instruction: Click on the X icon at the bottom left corner of the screen.
action: action_type: click
step_instruction: Click on the text "Aa" on the left side of the three dots on the top right corner of the screen.
action: action_type: click
step_instruction: Select the theme Black.