KEYWORD
    Orientation WorkingSpace

DESCRIPTION Flip
    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 from X and Y, but in a flipped 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.

    Flip accepts the command-line arguments described in Region.hlp.
    To set the desired orientation of the output from the command
    line, include one of the following options:

         -xz
              The output generated has xy sections that correspond
              to xz sections from the input.  This is the default.

         -yz
              The output generated has xy sections that correspond
              to yz sections from the input.

         -zy
              The output generated has xy sections that correspond
              to zy sections from the input.

    To set the working space, include

        -maxmem=n

    in the options where you would replace n with the desired amount
    of memory to usie in megabytes.  If you do not set the size of
    the working space from the command line, Flip will use up to
    64 megabytes (or at least enough space for one output section
    if an output section is bigger than 64 megabytes).

     As an example, the following command interchanges the y and z
     axes of recon.xzyw and puts the result in recon.xyzw:

         Flip recon.xzyw recon.xyzw

Orientation
    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.

WorkingSpace
    At a minimum, Flip keeps at least one output section in
    memory, and it will keep more if the total amount of memory
    used is less than the value, in units of megabytes, shown
    in the "Working space" field.  You can adjust the amount
    of memory Flip uses by changing the value in the
    "Working space" field.  Using more memory (provided that
    it is not already in use for other processes) will generally
    speed up the process for yz or zy flipping operations.
    For xz flipping operations, determining the optimal amount
    of memory to use is more difficult.  If the data set to
    be flipped is much bigger than the physical memory
    available (in other words, Flip will not be able to make
    effective use of the operating system's caches), telling
    Flip to use more memory will usually speed up the flipping
    operation.  If the data set to be flipped is small enough
    to fit in the physical memory available, entering zero in
    the "Working space" field will usually be the optimal
    strategy.