Use the Colors toolbar to select a color and drag it to a field you want to highlight.
Or select the field using your mouse and choose a color from the List field color window in the lower left-hand corner of your screen. Possible entries help helps you select a color. Once you have chosen a color and applied it to a line, you can undo this selection by choosing Line color once again.
The colors available are described by terms which identify their use in SAP standard displays.