Snow Leopard’s Numbers application lets you add shading to cells. Shading the contents of a cell, row, or column is helpful when your spreadsheet contains subtotals or logical divisions. Follow these steps to shade cells, rows, or columns:
Click in or drag across the cells, rows, or columns you want to format.
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The cells appear highlighted. You can use the scroll bars to navigate in the spreadsheet.
Click the Inspector toolbar button.
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The Inspector opens.
Click the Graphic Inspector button in the Inspector toolbar.
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Numbers displays the settings.
Click the Fill pop-up menu.
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Select a shading option.
Click the color box to select a color for your shading.

Numbers displays a color picker. Click to select a color.
Click the Close button in the color picker. Click the Inspector’s Close button.
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You return to the spreadsheet with the shading and colors you chose applied.