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The target window can be specified by id, name, or may be selected by clicking the mouse in the desired window. If you press a button and then drag, a rectangle will form which expands and contracts as the mouse moves. To save the portion of the screen defined by the rectangle, just release the button. The keyboard bell is rung once at the beginning of the screen capture and twice when it completes.
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Note, options -dither, -colorspace, and -treedepth affect the color reduction algorithm.
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The Transparent color space behaves uniquely in that it preserves the matte channel of the image if it exists.
The -colors or -monochrome option is required for this option to take effect.
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%b file size
%d directory
%e filename extension
%f filename
%h height
%m magick
%p page number
%s scene number
%t top of filename
%w width
%x x resolution
%y y resolution
\n newline
\r carriage return
For example,
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This option is useful for regulating the display of the sequence of images. 1/100ths of a second must expire before the display of the next image. The default is 6/100th of a second between each frame of the image sequence. The second value is optional. It specifies the number of seconds to pause before repeating your animation sequence.
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0 No disposal specified. 1 Do not dispose between frames. 2 Overwrite frame with background color from header. 3 Overwrite with previous frame.
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Use > to change the dimensions of the image only if its size exceeds the geometry specification. < resizes the image only if its dimensions is less than the geometry specification. For example, if you specify 640x480> and the image size is 512x512, the image size does not change. However, if the image is 1024x1024, it is resized to 640x480.
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11x17 792 1224
Ledger 1224 792
Legal 612 1008
Letter 612 792
LetterSmall 612 792
ArchE 2592 3456
ArchD 1728 2592
ArchC 1296 1728
ArchB 864 1296
ArchA 648 864
A0 2380 3368
A1 1684 2380
A2 1190 1684
A3 842 1190
A4 595 842
A4Small 595 842
A5 421 595
A6 297 421
A7 210 297
A8 148 210
A9 105 148
A10 74 105
B0 2836 4008
B1 2004 2836
B2 1418 2004
B3 1002 1418
B4 709 1002
B5 501 709
C0 2600 3677
C1 1837 2600
C2 1298 1837
C3 918 1298
C4 649 918
C5 459 649
C6 323 459
Flsa 612 936
Flse 612 936
HalfLetter 396 612
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0: none
1: sub
2: up
3: average
4: Paeth
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Options are processed in command line order. Any option you specify on the command line remains in effect until it is explicitly changed by specifying the option again with a different effect.
file specifies the image filename. If file is omitted, it defaults to magick.miff. The default image format is MIFF. To specify a particular image format, precede the filename with an image format name and a colon (i.e. gif:image) or specify the image type as the filename suffix (i.e. image.jpg). See Image Formats Supported by ImageMagick for a list of valid image formats.
Specify file as - for standard output. If file has the extension .Z or .gz, the file size is com pressed using with compress or gzip respectively. Precede t he image file name | to pipe to a system command. If file already exists, you will be prompted as to whether it should be overwritten.
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