Maybe your question is not clearly enough described or illustrated?

The illustration shows the top 3/4 view of my models bone structure. As you can see. everything is symmetrical. The red lines represent the arm beginning at the shoulder joint. When I first placed the bones, if I used the duplicate with symmetry command I would get a perfect mirror image. Now I get a perfect mirror image but it seems now Carrara is using a different angle to mirror the bones. How can I control the axis that Carrara uses to mirror the item. The selected blue area is where Carrara is placing the arm, the red area represents where I expected the bones to be using the command. Dose this make sense now? English is my second language so please bare with me.

Attached Link: http://http://forums.polyloop.net/carrara-tutorials/5004-c5-rigging-skinning-bones-setup.html

I presume you are installing the bones using a 4 point view ( your bones are in the right place in all dimensions)?

I am having a difficulty also today--there is a tute --I will try and find it

Even after following that very good tute, you still may find the axis revolve-as attached screen shot-- to be of use I think.

Hope that solves all your problems.

Hope that solves all your problems.

Thanks for your help. Under closer inspection the bone that I was generating the arm from was not facing forward exactly. That was the reason why it looked turned.