Select the cells to which you want to add some type of border.
Click the down arrow next to the Borders button on the Formatting toolbar and select an option from the list that appears for example, select All Borders.
The border is applied.
INTRODUCTION
Each side of a cell is considered a border. These borders provide a visual cue as to where a cell begins and ends. You can customize borders to indicate other beginnings and endings, such as grouping similar data or separating headings from data. For example, a double line is often used to separate a summary value from the data being totaled. Changing the bottom of the border for the last number before the total accomplishes this effect.
TIP
Removing Borders
To remove a border, select the bordered cells, click the down arrow next to the Borders button on the Formatting toolbar, and select the No Border option. Be careful, though; you might eliminate an intended border in a nearby cell.
