i did 4 layer board which stackup is TOP,GND,PWR,BOTTOM. i need to swap the Ground and Power in inner layer.what is the procedure to interchange without distrubing other layer.if i will interchange the layer my stack-up should come like that TOP.PWR,GND,Bottom.
It is a straight forward and easy procedure. Go to Setup > Layer Definition and select Modify. Now you can reassign layer 2 to be 3 and layer 3 to be layer 2. In short you will be moving layers up or down.