The IK target is only visible while you hold and move say the hip and pull the body away from the ground.  As soon as you release the hip then the IK targets disappear.  Which is why they are only slightly useful.  In that you can see where the target is when moving but not always and if the foot/hand is still at the target location then it is hidden, and you never see it.  It would be really nice to have the targets visible all the time, except that you would not see them if they were covered.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13