› how-to-make-spreadsheetsHow to Make a Spreadsheet in Excel, Word, and Google Sheets ... Jun 13, 2017 · Now, make the outer boundary of each block thicker by selecting the entire area and choosing Thick Box Border. Finally, do the same around the inner row of each box labeled Subtotal, to make these visually distinct. Apply a Thick Box Border to Column O, Total, and leave spaces between each row grouping. All of this improves spreadsheet readability.