Flags: This formula displays a green, yellow, or red flag image to indicate case priority.
IMAGE( CASE( Priority, "Low", "/img/samples/flag_green.gif", "Medium", "/img/samples/flag_yellow.gif", "High", "/img/samples/flag_red.gif", "/s.gif"), "Priority Flag")
Colors: This formula displays a 10 x 10 pixel image of a red, yellow, or green, depending on the value of a Case Age custom number field.
IF( Case_Age__c > 20, IMAGE("/img/samples/color_red.gif", "red", 10, 10), IF( Case_Age__c > 10, IMAGE("/img/samples/color_yellow.gif", "yellow", 10, 10), IMAGE("/img/samples/color_green.gif", "green", 10, 10) ))
Lights: This formula displays a green, yellow, or red traffic light images to indicate status, using a custom picklist field called Status.
IMAGE( CASE(Status__c, "Green", "/img/samples/light_green.gif", "Yellow", "/img/samples/light_yellow.gif", "Red", "/img/samples/light_red.gif", "/s.gif"), "status color")
Stars: This formula displays a set of one to five stars to indicate a rating or score.
IMAGE( CASE(Rating__c, "1", "/img/samples/stars_100.gif", "2", "/img/samples/stars_200.gif", "3", "/img/samples/stars_300.gif", "4", "/img/samples/stars_400.gif", "5", "/img/samples/stars_500.gif", "/img/samples/stars_000.gif"), "rating")
Circles: This formula displays a colored circle to indicate a rating on a scale of one to five, where solid red is one, half red is two, black outline is three, half black is four, and solid black is five.
IMAGE( CASE(Rating__c, "1", "/img/samples/rating1.gif", "2", "/img/samples/rating2.gif", "3", "/img/samples/rating3.gif", "4", "/img/samples/rating4.gif", "5", "/img/samples/rating5.gif", "/s.gif"), "rating")
Priority: This formula displays a red colored priority sign to indicate a priority picklist value.
IMAGE( CASE(Priority__c, "Very Low", "/img/samples/rating1.gif", "Low", "/img/samples/rating2.gif", "Medium", "/img/samples/rating3.gif", "High", "/img/samples/rating4.gif", "Very High", "/img/samples/rating5.gif", "/s.gif"), "rating")