Show timer Shows the elapsed time for the current puzzle.
Pausable personal timer Pausable timer for relaxed solving. Your wall-clock time is still tracked for rankings.
Show checkpoints Save and restore board states. Useful for trying different solving paths.
Compact controls Hides the captions of the control buttons saving space on the screen.
Momentum panning Keep the board gliding after a quick flick of the finger.

Show Pointer Shows a pointer helper. Useful for bigger puzzles on touch screens.
Left handed Changes the pointer direction.
Highlight errors Marks in red wrong rectangles.
Use blue color for errors Helps color blind users to see the errors.
Show cell counter Shows a helper, counting the area of the drawn rectangle.
Allow shrinking overlapping areas New rectangles can be drawn over existing ones, shrinking them.
Allow extending areas New rectangles drawn from within existing ones will extend them.
Two taps instead of drag to draw a rectangle Tap one corner, then the opposite corner to form a rectangle — no dragging required.
Classic view
Highlight last change Makes your last move more visible.
Gray out completed rectangles Automatically grays out rectangles that are correct.
Color completed rectangles