How do I change the background? Start a game. Tap the palette icon in the top right corner of the screen. Select one of the available background colors. Adjust the screen brightness by dragging the slider left or right. Related articles How is your score calculated? How do I make notes? How do I delete a number entered by mistake? Why do the numbers I enter look so small? How do I change the difficulty level? Comments 0 comments Article is closed for comments.
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