How do I stop the axes orientating automatically

Hi I notice that the axes automatically change orientation when I am modelling something, expecially with complex angles or irregular shape and I am not aware until after I create a group, and then it seems impossible to re-orientate to suit the Z axes. Does anyone know how I can prevent the axes from changing? I do know how to set the axes manually or to orientate it to suit a face, but I just want to be able to control when that happens. It seems to have a life of it’s own and it’s driving me nuts!

sorry this is teh wrong query, I am trying to set up a new topic regarding axes