The formula bar is where you enter text, numbers and formulas into cells and fields.
The formula bar shows the name of the current cell and what type of information it contains. You can click anywhere within the contents of the formula bar to edit the spreadsheet cell.
There are three buttons to assist in editing the cell contents:
Confirm button or Enter key. Saves the contents of the formula bar into the spreadsheet.
Cancel button or Esc key. Aborts the current edit and returns the cell to its previous state.
Functions button . Calls on a list of over 200 built-in functions. For more information, see Function reference.