| Option | Description | 
  
    | -affine matrix | affine transform matrix | 
  
    | -alpha | activate, deactivate, reset, or set the alpha channel | 
  
    | -authenticate value | decrypt image with this password | 
  
    | -blend geometry | blend images | 
  
    | -blue-primary point | chromaticity blue primary point | 
  
    | -border geometry | surround image with a border of color | 
  
    | -bordercolor color | border color | 
  
    | -channel type | apply option to select image channels | 
  
    | -colors value | preferred number of colors in the image | 
  
    | -colorspace type | set image colorspace | 
  
    | -comment string | annotate image with comment | 
  
    | -compose operator | set image composite operator | 
  
    | -compress type | image compression type | 
  
    | -debug events | display copious debugging information | 
  
    | -decipher filename | convert cipher pixels to plain | 
  
    | -define format:option | define one or more image format options | 
  
    | -density geometry | horizontal and vertical density of the image | 
  
    | -depth value | image depth | 
  
    | -displace geometry | shift image pixels defined by a displacement map | 
  
    | -dissolve value | dissolve the two images a given percent | 
  
    | -dither  method | apply error diffusion to image | 
  
    | -encipher filename | convert plain pixels to cipher pixels | 
  
    | -encoding type | text encoding type | 
  
    | -endian type | endianness (MSB or LSB) of the image | 
  
    | -extract geometry | extract area from image | 
  
    | -filter type | use this filter when resizing an image | 
  
    | -font name | render text with this font | 
  
    | -geometry geometry | preferred size or location of the image | 
  
    | -gravity type | horizontal and vertical text placement | 
  
    | -green-primary point | chromaticity green primary point | 
  
    | -help | print program options | 
  
    | -identify | identify the format and characteristics of the image | 
  
    | -interlace type | type of image interlacing scheme | 
  
    | -interpolate method | pixel color interpolation method | 
  
    | -label string | assign a label to an image | 
  
    | -level value | adjust the level of image contrast | 
  
    | -limit type value | pixel cache resource limit | 
  
    | -log format | format of debugging information | 
  
    | -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) | 
  
    | -pointsize value | font point size | 
  
    | -profile filename | add, delete, or apply an image profile | 
  
    | -quality value | JPEG/MIFF/PNG compression level | 
  
    | -quantize colorspace | reduce image colors in this colorspace | 
  
    | -quiet | suppress all warning messages | 
  
    | -red-primary point | chromaticity red primary point | 
  
    | -regard-warnings | pay attention to warning messages. | 
  
    | -respect-parenthesis | settings remain in effect until parenthesis boundary. | 
  
    | -rotate degrees | apply Paeth rotation to the image | 
  
    | -sampling-factor geometry | horizontal and vertical sampling factor | 
  
    | -scene value | image scene number | 
  
    | -seed value | seed a new sequence of pseudo-random numbers | 
  
    | -set attribute value | set an image attribute | 
  
    | -sharpen geometry | sharpen the image | 
  
    | -shave geometry | shave pixels from the image edges | 
  
    | -size geometry | width and height of image | 
  
    | -stegano offset | hide watermark within an image | 
  
    | -strip | strip image of all profiles and comments | 
  
    | -swap indexes | swap two images in the image sequence | 
  
    | -thumbnail geometry | create a thumbnail of the image | 
  
    | -tile | repeat composite operation across and down image | 
  
    | -transform | affine transform image | 
  
    | -transparent-color color | transparent color | 
  
    | -treedepth value | color tree depth | 
  
    | -type type | image type | 
  
    | -units type | the units of image resolution | 
  
    | -unsharp geometry | sharpen the image | 
  
    | -verbose | print detailed information about the image | 
  
    | -version | print version information | 
  
    | -virtual-pixel method | access method for pixels outside the boundaries of the image | 
  
    | -watermark geometry | percent brightness and saturation of a watermark | 
  
    | -white-point point | chromaticity white point | 
  
    | -white-threshold value | force all pixels above the threshold into white | 
  
    | -write filename | write images to this file |