Hello! I am creating eyes in ZBrush for my model, and decided to rotate the body a bit, to see if the eyes were put in properly, and if the irises are showing. However, I clicked the body subtool which has nothing to do with the eyes subtool, and the eyes start moving along with how I rotate. How do I fix this problem? It’s really bothering me! >.< Any help is greatly appreciated! 
Could you elaborate on what I should do? Is this problem happening because I don’t have Transpose Master on? Thank you for the link ^^ (Also what buttons do I press?)
A picture would be helpful, but it sounds like the eyes and body are in the same subtool. Unless you are confusing the terms “Subtools” and “Polygroups”.
If you originally placed the eyes in the body subtool, for instance with an insert brush, and then split them off into a separate subtool, what can sometimes happen is that after you split them mesh and Ctrl-Z for whatever reason, the split geometry reappears in your original body subtool, but you didn’t notice it because of the overlapping eye subtool.
Hit “solo” mode on the lower right of the viewport frame, and select the body subtool. If you see eyes in there, then you have a copy of the eyes in the subtool, and will need to either delete them or split them off into a separate subtool. Otherwise the eyes will be affected like any other part of the active subtool that isn’t masked off.
You should read more of the documentation, then you may understand which buttons to press. We’re willing to help out. 
I tried this out and didn’t see the eyes while in solo mode with the body subtool. I don’t know what’s wrong with this eye, but it rotates with every subtool , and I have checked everything in solo mode.
Let me ask a crazy question. When you say you’re “rotating” a subtool, you mean via the transpose function or in the deformation menu, right? Because if you’re talking about just normal viewport navigation, then yes, all the subtools “rotate” together. You’re just changing the camera view. To rotate a subtool independently of another in the worldspace, you’d have to actually rotate the geometry. I apologize if this is a silly question.
Otherwise, could you post a picture of the problem? Preferably one that includes a shot of your subtool list?