› Useful tips » Earmarks (small numeric notes) can be added to any cell. They allow you to mark possible values for a cell. Earmarks allow you to store any number of digits in the cell. Each digit may be selected only once.
To add earmarks to a cell:
Select the cell.
Press Ctrl+1 through Ctrl+9.
You can remove a number from the earmarks by pressing Ctrl+1 through Ctrl+9 again.
You can also add earmarks by clicking the cell while pressing Ctrl, or right-clicking the cell, and then choosing a number.
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