How to set custom tab order of cells in excel spreadsheet for mac

I created an order form in Excel on my mac. I'd like to set a custom tab order to go from one cell to the next. Can that be done on Excel for Mac? If so, can you please provide instructions on how to do it?

Thanks, in advance.
Hector

Do you want to go from cell to cell on a tab or Enter or only after you enter data? Either way, a sample workbook will help. Give us an idea of how you want the order of cells to go. It might be something as simple as protecting the sheet.