You can customize the appearance of the cells by setting borders for a cell or range
A border can be displayed on the left, right, top, or bottom, or around all four
sides of a cell or cell range. A border can be displayed as any of the built-in
styles or customized borders that you define. You can specify more than one style
and color for the same cell, column, row, or block of cells.
Different border styles let you set different options. For example, the complex
border lets you set different styles of border to display for each side of the cell
- the top and bottom borders are dashed borders and have a different color from
the left and right borders. For each of these border styles, you can turn off the
display of the border on any side of the cell.