Over the years I have purchased some items that I have found to be a little difficult to use due to them not being visible in the workroom when the "Draw Style" options are set to either "Texture" or "NVIDIA Iray" (These are the only two that I use). In fact, the only time they come to life is during a full render, and at that point, I only then see things that need correction, leading me into a plethora of guess work when returning to the workroom. 

 I have made sure that these items visibility are all set to "On", but for some hair, I just get to see the skullcap, and for some landscapes I only get to see a green plane, but no grass blades, no matter what I have turned on.

So, my question is, what am I missing, or is this just what it is?