How can I specify the size of a shadow with imagemagick?This command works:montage foo.jpg bar.jpg foobar.jpg -background lightgray -geometry 1031x1642+57+57 -shadow -monitor -tile 3x1 out.pngWhile this one gives an error:montage foo.jpg bar.jpg foobar.jpg -background lightgray -geometry 1031x1642+57+57 -shadow 100x10+200+200 -monitor -tile 3x1 out.pngThe error being:montage: unable to open image 100x10+200+200': No such file or  directory @ error/blob.c/OpenBlob/2675. montage: no decode delegate  for this image format' @ error/constitute.c/ReadImage/501.
Imagemagick mogrify with shadow geometry
command line;images;imagemagick;image manipulation;mogrify