Define cells

To define a style first make sure you are on the home tab. Go under the styles group and click on cell styles. There are multiple styles that can help you with the style you want on your worksheet. You can also create a new style by going to the home tab and going to the styles group and clicking on cell styles. From here you click on new cell style. The style dialog box will pop up and you name the new style. Then click on the format button and the format cells dialog box will pop up and you can customize the new style.