I think this is the default setting of zbrush that when I have multiple subtool in my model. As I orbit and move around the camera all the other subtool are gone, and as I stop moving it turns back on. It is extremely annoying especially when I want to lineup the selected subtool to others. How can I turn it on so it shows up all the time?
This should help. http://www.zbrushcentral.com/showthread.php?161588-quot-Axis-quot-Plugin-for-ZBrush-4r2
Turn off Dynamic in the Solo button. See here:
http://docs.pixologic.com/reference-guide/transform/#solo-mode