Essentially, Flip allows you to view your dataset from the "side" - so that what once Z axis (the axis perpendicular to the screen when an image is viewed) will now fall in the plane of the screen. Be cautious in how you visually interpret the results of Flip. You are most often looking at data where the size of the pixels in the X dimension and the Y dimension are equal. The Z pixel size (section spacing) is often quite different different from X and Y, but in a fipped view the pixels are still represented as square, so the aspect ratio will not be 1-to-1. To obtain a 1-to-1 aspect ratio, use Resample2D and adjust the magnification on the X or Y axis to equate the X and Y pixel spacings.
Overview | Dialog | New Orientation
Priism | Categories | Applications | Resample2D
Use this menu to select the orientation of the output. The names of the selection indicate which of the axes in the input will fall along the X and Y axes of the output. With X-Z Sections, for instance, the old X axis will run along the new X axis and the old Z axis will run along the new Y axis.
Overview | Dialog | Orientation