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In desktop Excel, F4 has two different uses depending on what you are doing: while editing a formula, it cycles the selected cell reference between relative, absolute, and mixed forms; outside formula editing, it can repeat the last action if that action is repeatable. The shortcut differs on Mac and in Excel for the web.

F4 at a glance: the task and platform matter

Where and what you are doing Shortcut documented by Microsoft What it does
Windows desktop Excel, with a cell reference selected while editing a formula F4 Cycles the selected reference type.
Windows desktop Excel, after a repeatable action F4 or Ctrl+Y Repeats a simple action when repetition is available.
Mac desktop Excel, with a reference selected in a formula Command+T Cycles reference types in the Microsoft 365, Excel 2024, and Excel 2021 Mac editions listed by Microsoft.
Mac desktop Excel, after a repeatable action Command+Y Repeats a simple action.
Excel for the web, after a repeatable action Ctrl+Y Repeats a simple action; Microsoft notes advanced options are available in desktop Excel.

Microsoft’s shortcut guidance lists F4 for reference cycling in Excel, while its Mac-specific guidance gives Command+T for the Mac editions named above. See Microsoft’s Excel keyboard-shortcut list and its Mac reference instructions for their respective details. Repeat behavior is covered in Microsoft’s guidance on undoing, redoing, or repeating an action.

How F4 changes formula references

A formula reference tells Excel which cell or range to use. Its dollar signs determine whether the column, row, both, or neither stays fixed when you copy the formula.

Reference form Type What stays fixed when copied
A1 Relative Neither the column nor the row.
$A$1 Absolute Both the column and the row.
$A1 Mixed The column; the row can change.
A$1 Mixed The row; the column can change.

For example, if a formula in D4 refers to B4 and you copy it down one row, the relative reference changes to B5. If the formula must keep pointing to B4, make it $B$4. Use $B4 if the column must remain B while the row follows the formula, or B$4 if the row must remain 4 while the column follows it.

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Cycle a reference while editing

  1. Start editing the formula in the formula bar or in the cell.
  2. Select the reference you want to change, such as B4. Make sure the reference itself is selected rather than leaving the cursor elsewhere in the formula.
  3. Press F4 on Windows desktop Excel, or Command+T on the Mac editions covered by Microsoft’s Mac instructions.
  4. Check the formula to confirm the dollar signs now lock the intended row, column, or both before accepting it.

A common cycle is A1 → $A$1 → A$1 → $A1 → A1. The form shown next depends on the reference’s starting form, so do not assume a press always produces the same next form. Verify the formula after each press. Microsoft’s instructions explain relative, absolute, and mixed references.

When F4 repeats an action

When you are not cycling a formula reference, F4 can repeat a simple prior action if that action supports repetition. Microsoft gives a paste operation as an example. Ctrl+Y can also repeat a simple action in desktop Excel; the Repeat command is not on the Quick Access Toolbar by default, though you can add it.

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Not every operation can be repeated. Microsoft specifically notes that using a function in a cell is one example of an action that cannot be repeated. If an action does not repeat, the limitation may be the action rather than the key.

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If F4 does not work

  • For a formula reference: Confirm you are editing the formula and have selected the cell reference. On Mac, use Command+T for reference cycling as documented for the listed editions.
  • For a repeat action on Windows: Try Ctrl+Y. If F4 itself appears unresponsive, Microsoft says the keyboard may require F-Lock or Fn with F4.
  • For a repeat action on Mac: Use Command+Y, not Command+T; Command+T is the reference-cycling shortcut in the Mac instructions.
  • In Excel for the web: Use Ctrl+Y for a simple repeat action. Microsoft’s guidance points to desktop Excel for advanced options.
  • If the action still will not repeat: It may not be repeatable, as with entering a function in a cell.

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