By default, when you create a document, there are no borders between cells. The grid visible on the sheet conventionally separates cells one from another to make working with data easier, and is not displayed when printing.
To add borders to cells or change settings previously applied to borders, follow these steps:
1.Select the desired cell or range of cells.
2.On the Home tab, in the Font group, click the arrow to the right of the
button.
3.In the border settings pane that opens, in the first settings block, specify the position of the borders for which you want to change the parameters.
4.In the second block of settings, select the type of line to be applied to the specified borders.
5.In the third block of settings, specify the line color using one of the following methods:
•Choose a color from one of the color sets provided.
•Specify the color code manually.
•Copy the color with an eyedropper.

Border settings pane