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Show timer
Shows the elapsed time for the current puzzle.
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Compact controls
Hides the captions of the control buttons saving space on the screen.
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Show board coordinates
Helps for better reference when discussing a move or asking for help.
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Show Pointer
Shows a pointer helper. Useful for bigger puzzles on touch screens.
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Left handed
Switches the pointer direction.
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Highlight current group of islands
Helps identifying an isolated group of islands. When disabled you can use the [Shift] key and hover over an island to highlight its group.
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Highlight wrong numbers
Marks in red an island with more bridges than required.
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Use blue color for errors
Helps color blind users to see the errors.
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Click/tap between islands to draw bridges
When disabled you need to draw bridges by clicking/tapping on the islands and dragging in the desired direction.
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Ctrl key defines bridge direction priority
Ctrl key prioritizes horizontal bridges.
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Left click - 1 bridge, Right click - 2 bridges
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Auto mark completed islands
Marks in gray / strikes out the completed islands.
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Gray out bridges to completed islands
Marks in gray the bridges connected to the completed islands.
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Highlight last change
Makes your last move more visible.
Completed numbers style