xdbge documentation

Last week I found the xdbge debugger, and it is awesome. I have the documentation for the dbge, but I don't know the exact behaviour of the new features added in xdbge. I found in an old thread here that the user coldbreeze told he uses it, and maybe he could explain a bit the use of the new parameters and U key, but I don't have any contact information of him, so I hope he can read this post.