💡 How to use:
• Focus formula bar — Press F2 to edit the active cell in the fx bar
• Confirm & move down — Enter in the fx bar
• Confirm without moving — Ctrl+Enter in the fx bar
• Move to next cell — Tab in the fx bar
• Revert changes — Escape in the fx bar to restore original value
• Insert a function — Click any function below, or use Ribbon Insert tab → ƒ Function button