Formating

Hi Gerard, Thank you for your question:

It is not normal to format a formula, you would normally format the result of the formula, and to do this you select the cell/s and then on the Menu bar got to Format>Cells and from the tabs choose the formatting you wish to apply.
If however you mean how do you create a 3D formula:
Select the cell you wish to have the result appear in, press the = key on your keyboard and then navigate to the worksheet/workbook to find the cell you wish to link to, select it and press Enter. I hope that helps ... Pete