How to grey out unused cells in Excel

This guide describes how to grey out unused cells in Excel in Windows 11/10, apply a solid fill color, use Conditional Formatting, or hide unused rows/columns.
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How to use Excel's Power Query to tidy up messy spreadsheet data

To clean up the messy data, it needs to be loaded into the Power Query Editor.
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7 Microsoft Excel tricks you probably didn't know

Press Ctrl+; to insert the current date. Press Ctrl+Shift+; to insert the current time. Press Ctrl+; > Space > Ctrl+Shift+; ...