To enable dark mode on Android 9: Launch the Settings app and tap Display. Tap Advanced to expand the list of options. Scroll down and tap Device theme, then tap Dark in the pop-up dialog box.

Does Android 9 Gmail have dark mode?

Just go to Settings > scroll down and tap on the Display option > and tap on the Dark theme toggle. Gmail will, by default, automatically respond to this system default setting.

How do I get system-wide dark mode on Android 9?

Tap your Google profile icon. Open the Settings tab. Locate the Dark theme menu. Toggle between Light theme, Dark theme, or Use system settings.