Instead of looking at three orthogonal slices through the data set, a series of slices (all of the same orientation) can also be examined. Select: "View->Series", and a dialog box will come up allowing you to pick which objects you'd like to display on the series viewer, along with if you'd like to display the slices over space, time, or gates. The thickness of the slices are determined at the time the series window is brought up. A slider appears on the top of the window which allows moving through the data set. Note that since slices are cached in memory after being displayed, already displayed slices do not need to be regenerated from the data set and reviewing these slices is significantly faster.