From what I have read the MKIV can only display one "group" of POIs on the map at a time. So if you display gas stations, you cannot display coffee shop, supermarkets, speed cams, etc....

My question is so how do you select which POI group you would like displayed on the Map? I noticed in the "Travel Information" directory structure there is a setting to hide map icons, but nothing to enable them. Also, once you select the hide map icons feature you can not unselect it as it's disabled. I also didn't really notice a difference on the map, but I may not have been paying close enough attention.

If it makes a different I am using Disk-2 of the TeleAtlas High Maps for 2010.1.