There isn't a single shortcut key to format cells in Excel. However, you can use the Ctrl+1 shortcut to open the Format Cells dialog box, where you can access various formatting options.
Here are some examples of specific formatting tasks and their shortcut keys:
- Bold: Ctrl+B
- Italic: Ctrl+I
- Underline: Ctrl+U
- Font Color: Ctrl+Shift+F
- Fill Color: Ctrl+Shift+A
- Alignment: Ctrl+1 (then select alignment options)
- Number Formatting: Ctrl+1 (then select number format)
You can also use the Format Painter tool to quickly apply formatting from one cell to another. To use the Format Painter, select the cell with the desired formatting, click the Format Painter button on the Home tab, and then click on the cell(s) where you want to apply the formatting.
Remember that these shortcuts may vary slightly depending on your operating system and Excel version.