for example you don't have to dig around with cam controls on a panel (like in Bryce or Poser) unless you WANT to, but instead can just hold down alt. Alt+LMB is rotate, Alt+MMB is pan, and Alt+RMB is zoom in/out. I don't know about Bryce, but Poser has such shortcuts. space+LMB = pan control+LMB = rotate control+space+LMB = zoom (on the Mac, replace control with Apple)