If you have reconstructed a stack using the reconstruction wizard Voloom allows you to increase the magnification factor (or the resolution) for a particular region of interest. To accomplish this simply

  1. Zoom into a specific region of interest in the upper left view of Voloom (using the mouse wheel while holding the CTRL key) and
  2. either press the button  (in the top right corner) to update the resolution or press the "F5" key.