Which of the following techniques will not change the weight distribution across your axles?

There are several ways to distribute or redistributing the overall weight of the vehicle across the different sets of axles. You will affect weight distribution by:
Changing the weight distribution of the cargo along the length of the trailer, or moving the cargo around after the truck has been loaded. This will distribute the weight mainly between your drive axles and trailer tandems
Sliding your trailer tandems forward or backward will redistribute the weight mainly between your drive axles and trailer tandems
Sliding your 5th wheel will redistribute the weight mainly between your steer axle and your drive axles
Adding or burning off fuel will mainly change the amount of weight on your steer axle and somewhat on your drive axles also, depending upon the placement of your fuel tanks.