You can apply formatting to an entire cell and to the data inside a cell—or a group of cells. One way to think of this is the cells are the frame of a picture and the picture inside the frame is the data.
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Formal Cells
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Select the cells.
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Go to the ribbon to select changes as Bold, Font Color, or Font Size.
Apply Excel Styles
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Select the cells.
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Select Home > Cell Style and select a style.
Modify an Excel Style
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Select the cells with the Excel Style.
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Right-click the applied style in Home > Cell Styles.
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Select Modify > Format to change what you want.
Need more help?
You can always ask an expert in the Excel Tech Community or get support in Communities.