I swear I've asked this question before, but I can't find the thread if I did. I'm having trouble copying weights from oneside of my rig to the other via Vertex Groups. From what I'm aware of, you select a bone/vertex group, click on the grey drop down arrow, select Copy Vertex Group, and then rename the copy so the name is the opposite of the original. So the original is something like D_Shoulder.L and you rename the copy to D_Shoulder.R. Every time I do this though, nothing happens. It doesn't change sides. I end up having the weights in the same place in two vertex groups. I'm not sure what I've done wrong. I even tried enabling Mirror Weights and Topology Mirror under Tools and X Mirror and Topology Mirror under Options, but they haven't worked.