The Font Brush pane is used to customize the digits on your Digital gauge.
Brush Type — This drop-down list lets you change the brush type of the digits on your Digital gauge.
Brush Color — Depending on which brush type you select, the brush color list will populate with the colors available for that brush type.
Relative Bounds Editor — This pop-up menu displays two bounds editors, Relative Bounds and Relative Clip Bounds, that allows you to determine the size and location of your brush element.