How? How can I choose between the dark theme (like deep space) and the light one (like stardust)? We know this is not that easy. That’s why we give you an opportunity to change the theme in one click. One — and you’re in interstellar space. Two — you are in the globular cluster. Enjoy it!
Change the theme
Click on 
Themes.
Themes.The button Themes is in the Upper toolbar. Upper toolbar is a panel with five buttons on the top of the Main application panel. Each button of the Upper toolbar gives you a quick access to any of the tools: Search, Check, Focus, Notifications, Pomodoro, Themes, New window.
Dark theme
If you like to plan before bedtime.
The light background of the application will not let you fall asleep for three hours or so. So when you reflect on the day before going to bed and plan for tomorrow, use a dark theme.
If you have an OLED screen.
An OLED screen does not require backlighting (unlike LCD displays). Using a dark theme, you significantly extend the lifetime of your device.
Light theme
Use a light theme when working in a brightly lit room.
