How to use optimizer settings in 3D reconstruction

Hi,

I am trying to study the performance of the different algorithms to register two volumes depending on the initial position of the moving volume. My idea is to modify the coordinates of the moving volume and see how it affects the cost function value. I can see that that there is a “Random Study” option in the “Show Optimizer Settings” inside “Image Registration Settings” that could make something similar to what I am looking for (attached image), however, I don’t complete understand the input parameters. What do you mean with “range”? And how can I get the initial coordinate systems before the registration process starts?

Thanks in advance,
Alba