Use this macro to bind world markers to your keys. To change between the various colors, simply change the last digit in the macro on the second line to the corresponding number in the table below! Thanks and hendlove to Pudkud for sending this in!
/click CompactRaidFrameManagerDisplayFrameLeaderOptionsRaidWorldMarkerButton
/click DropDownList1Button1
1 Blue square
2 Green triangle
3 Purple diamond
4 Red cross
5 Yellow Star
6 Clear All