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$ display
Version: ImageMagick 6.4.4 2010-10-19 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC

Usage: display [options ...] file [ [options ...] file ...]

Image Settings:
  -alpha option        activate, deactivate, reset, or set the alpha channel
  -antialias           remove pixel-aliasing
  -authenticate password
                       decipher image with this password
  -backdrop            display image centered on a backdrop
  -channel type        apply option to select image channels
  -colormap type       Shared or Private
  -colorspace type     alternate image colorspace
  -comment string      annotate image with comment
  -compress type       type of pixel compression when writing the image
  -define format:option
                       define one or more image format options
  -delay value         display the next image after pausing
  -density geometry    horizontal and vertical density of the image
  -depth value         image depth
  -display server      display image to this X server
  -dispose method      layer disposal method
  -dither method       apply error diffusion to image
  -endian type         endianness (MSB or LSB) of the image
  -filter type         use this filter when resizing an image
  -format "string"     output formatted image characteristics
  -geometry geometry   preferred size and location of the Image window
  -identify            identify the format and characteristics of the image
  -immutable           displayed image cannot be modified
  -interlace type      type of image interlacing scheme
  -interpolate method  pixel color interpolation method
  -label string        assign a label to an image
  -limit type value    pixel cache resource limit
  -loop iterations     loop images then exit
  -map type            display image using this Standard Colormap
  -monitor             monitor progress
  -page geometry       size and location of an image canvas
  -profile filename    add, delete, or apply an image profile
  -quality value       JPEG/MIFF/PNG compression level
  -quantize colorspace reduce colors in this colorspace
  -quiet               suppress all warning messages
  -regard-warnings     pay attention to warning messages
  -remote command      execute a command in an remote display process
  -repage geometry     size and location of an image canvas (operator)
  -respect-parenthesis settings remain in effect until parenthesis boundary
  -sampling-factor geometry
                       horizontal and vertical sampling factor
  -scenes range        image scene range
  -seed value          seed a new sequence of pseudo-random numbers
  -set property value  set an image property
  -size geometry       width and height of image
  -texture filename    name of texture to tile onto the image background
  -transparent-color color
                       transparent color
  -treedepth value     color tree depth
  -update seconds      detect when image file is modified and redisplay
  -verbose             print detailed information about the image
  -visual type         display image using this visual type
  -virtual-pixel method
                       virtual pixel access method
  -window id           display image to background of this window
  -window-group id     exit program when this window id is destroyed
  -write filename      write image to a file

Image Operators:
  -auto-orient         automatically orient image
  -border geometry     surround image with a border of color
  -clip                clip along the first path from the 8BIM profile
  -clip-path id        clip along a named path from the 8BIM profile
  -colors value        preferred number of colors in the image
  -contrast            enhance or reduce the image contrast
  -crop geometry       preferred size and location of the cropped image
  -decipher filename   convert cipher pixels to plain pixels
  -deskew threshold    straighten an image
  -despeckle           reduce the speckles within an image
  -edge factor         apply a filter to detect edges in the image
  -enhance             apply a digital filter to enhance a noisy image
  -extract geometry    extract area from image
  -flip                flip image in the vertical direction
  -flop                flop image in the horizontal direction
  -frame geometry      surround image with an ornamental border
  -fuzz distance       colors within this distance are considered equal
  -gamma value         level of gamma correction
  -monochrome          transform image to black and white
  -negate              replace every pixel with its complementary color
  -raise value         lighten/darken image edges to create a 3-D effect
  -resample geometry   change the resolution of an image
  -resize geometry     resize the image
  -roll geometry       roll an image vertically or horizontally
  -rotate degrees      apply Paeth rotation to the image
  -sample geometry     scale image with pixel sampling
  -segment value       segment an image
  -sharpen geometry    sharpen the image
  -strip               strip image of all profiles and comments
  -threshold value     threshold the image
  -trim                trim image edges

Image Sequence Operators:
  -coalesce            merge a sequence of images
  -flatten             flatten a sequence of images

Miscellaneous Options:
  -debug events        display copious debugging information
  -help                print program options
  -list type           print a list of supported option arguments
  -log format          format of debugging information
  -version             print version information

In addition to those listed above, you can specify these standard X
resources as command line options:  -background, -bordercolor,
-borderwidth, -font, -foreground, -iconGeometry, -iconic, -mattecolor,
-name, -shared-memory, -usePixmap, or -title.

By default, the image format of `file' is determined by its magic
number.  To specify a particular image format, precede the filename
with an image format name and a colon (i.e. ps:image) or specify the
image type as the filename suffix (i.e. image.ps).  Specify 'file' as
'-' for standard input or output.

Buttons: 
  1    press to map or unmap the Command widget
  2    press and drag to magnify a region of an image
  3    press to load an image from a visual image directory