| Option | Description | 
  
    | -alpha | activate, deactivate, reset, or set the alpha channel | 
  
    | -antialias | remove pixel-aliasing | 
  
    | -authenticate value | decrypt image with this password | 
  
    | -backdrop | background color | 
  
    | -background color | background color | 
  
    | -border geometry | surround image with a border of color | 
  
    | -bordercolor color | border color | 
  
    | -channel type | apply option to select image channels | 
  
    | -clip | clip along the first path from the 8BIM profile | 
  
    | -clip-path id | clip along a named path from the 8BIM profile | 
  
    | -coalesce | merge a sequence of images | 
  
    | -colormap type | Shared or Private | 
  
    | -colors value | preferred number of colors in the image | 
  
    | -colorspace type | set image colorspace | 
  
    | -comment string | annotate image with comment | 
  
    | -compress type | image compression type | 
  
    | -contrast | enhance or reduce the image contrast | 
  
    | -crop geometry | preferred size and location of the cropped image | 
  
    | -debug events | display copious debugging information | 
  
    | -decipher filename | convert cipher pixels to plain | 
  
    | -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 | 
  
    | -despeckle | reduce the speckles within an image | 
  
    | -display server | get image or font from this X server | 
  
    | -dispose method | layer disposal method | 
  
    | -dither  method | apply error diffusion to image | 
  
    | -edge radius | apply a filter to detect edges in the image | 
  
    | -endian type | endianness (MSB or LSB) of the image | 
  
    | -enhance | apply a digital filter to enhance a noisy image | 
  
    | -extract geometry | extract area from image | 
  
    | -filter type | use this filter when resizing an image | 
  
    | -flatten | flatten a sequence of images | 
  
    | -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 | 
  
    | -geometry geometry | preferred size or location of the image | 
  
    | -help | print program options | 
  
    | -identify | identify the format and characteristics of the image | 
  
    | -immutable type | prohibit image edits | 
  
    | -interlace type | type of image interlacing scheme | 
  
    | -interpolate method | pixel color interpolation method | 
  
    | -label name | assign a label to an image | 
  
    | -limit type value | pixel cache resource limit | 
  
    | -log format | format of debugging information | 
  
    | -map filename | transform image colors to match this set of colors | 
  
    | -mattecolor color | frame color | 
  
    | -monitor | monitor progress | 
  
    | -monochrome | transform image to black and white | 
  
    | -negate | replace every pixel with its complementary color | 
  
    | -page geometry | size and location of an image canvas (setting) | 
  
    | -profile filename | add, delete, or apply an image profile | 
  
    | -quantize colorspace | reduce image colors in this colorspace | 
  
    | -quiet | suppress all warning messages | 
  
    | -raise value | lighten/darken image edges to create a 3-D effect | 
  
    | -regard-warnings | pay attention to warning messages. | 
  
    | -remote command | execute a command in an remote display process | 
  
    | -resample geometry | change the resolution of an image | 
  
    | -resize geometry | resize the image | 
  
    | -respect-parenthesis | settings remain in effect until parenthesis boundary. | 
  
    | -roll geometry | roll an image vertically or horizontally | 
  
    | -rotate degrees | apply Paeth rotation to the image | 
  
    | -sample geometry | scale image with pixel sampling | 
  
    | -sampling-factor geometry | horizontal and vertical sampling factor | 
  
    | -scene value | image scene number | 
  
    | -seed value | seed a new sequence of pseudo-random numbers | 
  
    | -segment values | segment an image | 
  
    | -set attribute value | set an image attribute | 
  
    | -sharpen geometry | sharpen the image | 
  
    | -size geometry | width and height of image | 
  
    | -strip | strip image of all profiles and comments | 
  
    | -transparent-color color | transparent color | 
  
    | -black-threshold value | force all pixels below the threshold into black | 
  
    | -trim | trim image edges | 
  
    | -update seconds | detect when image file is modified and redisplay | 
  
    | -verbose | print detailed information about the image | 
  
    | -version | print version information | 
  
    | -virtual-pixel method | access method for pixels outside the boundaries of the image | 
  
    | -visual | display image using this visual type | 
  
    | -window id | display image to background of this window | 
  
    | -window-group id | exit program when this window id is destroyed | 
  
    | -write filename | write images to this file |