Office 2011 for Mac: Format Cell Borders in Excel Worksheets
Formatting cells and cell ranges in Excel 2011 for Mac is like formatting tables. In the Font group of the Ribbon’s Home tab, clicking Borders button displays a drop-down gallery of border styles.
Experienced Excel users may yearn for the old floating Borders toolbar. Happily, you can find the Borders option on the Formatting toolbar, which you turn on by choosing View→Toolbars→Formatting from Excel's menu.
You can find more presets for borders in the Format Cells dialog, which you can display by pressing Command-1 and choosing the Border tab. If you select a cell range before opening the Format Cells dialog, you format the outer border as well as the inner borders.
Use the following order when you’re formatting a range of cells using the Border tab of the Format Cells dialog:
Color: Choose a color for your border from Excel’s color picker. The color you choose is displayed in the Style pane.
Style: Select a solid, dashed, thick, thin, or double-style border.
Border: For the border, you work in either the Presets area or the Border area.
In the Presets area, choose from these options:
None: Clears borders from the selected cell or cell range.
Outline: Applies a border to the selected cell or around the outside border of a range of cells.
Inside: Applies borders to cells within a selected range, but doesn't put a border around the entire range.
In the Border area, click in the preview, or click toggle buttons to turn individual outside, inside, or diagonal borders on and off.
You can apply multiple colors and line styles. You have to choose a new color and style for each border you turn on.