The button and menu option to view the solution log are disabled ("grayed out"). How can I enable them?

A. The solution log only records automatic moves, so if you haven't used an automatic solve method, the log is empty and the option to view it remains disabled. Use the "Solve It", "Single Step", "Ten Steps", "Complete Naked Singles" or "Complete Hidden Singles" to put entries into the solution log and so enable the option.

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