Excel X uses 10 point Verdana as the default font or typeface for worksheets. You can apply a variety of font formatting options to cells, some of which are shown in Figure 27:
Font is the typeface used to display characters. This includes all fonts properly installed in your system.
Font style is the weight or angle of characters. Options usually include Regular, Bold, Italic, and Bold Italic.
Size is the size of characters, expressed in points.
Underline is character underlining. Don't confuse this with borders, which can be applied to the bottom of a cell, regardless of its contents.
Color is character color.
Effects are special effects applied to characters.