Ctrl+C: Copy selected cells
Ctrl+V: Paste copied cells
Ctrl+Z: Undo the last action
Ctrl+Y: Redo the last action
Ctrl+A: Select all cells in the current sheet
Ctrl+S: Save the current workbook
Ctrl+F: Open the Find and Replace dialog box
Ctrl+B: Apply bold formatting to selected cells
Ctrl+I: Apply italic formatting to selected cells
Ctrl+U: Apply underline formatting to selected cells
Ctrl+1: Open the Format Cells dialog box
Ctrl+Shift+#: Apply date format to selected cells
Ctrl+Shift+$: Apply currency format to selected cells
Ctrl+Shift+!: Apply number format to selected cells
Ctrl+Shift+&: Apply outline border to selected cells
Ctrl+Shift+_: Remove border from selected cells
Ctrl+Shift+L: Toggle filter on/off for selected cells
Alt+Down arrow: Open drop-down menu for selected cell
Ctrl+Page Up: Move to the previous sheet in the workbook
Ctrl+Page Down: Move to the next sheet in the workbook
Note: Some of these shortcut keys may differ depending on your operating system or Excel version.
