Hello I’m just starting off in Zbrush doing tutorials and I’m currently following this one http://www.zbrushcentral.com/attachment.php?attachmentid=61028 but I’m having a problem with the retopology step. I select the zsphere go rigging select the mesh and then select edit topology, but when I shift left click to paint over the mesh like the say nothing happens 
If anyone could tell me how to do this, or point me to another tutorial about combining two meshes I would be very grateful thanks 
that feature was removed as far as I know. It would cause a lot of crashes before.
Ah, ok I found that using the clay brush you can just fill in the seam pretty well, and im sure I could learn the normal way of retopology thanks