Re: How to convert pdf to tiff as if it is done in Acrobat?

IM 6 generally uses its settings after an image has been read. The 
general exceptions are read modifiers that affect the reading of 
vector images.  In your case, you need to set the density before 
reading the pdf, but once it is read in, you then tell IM to convert 
it to monochrome before writing the output.

see
http://www.imagemagick.org/Usage/basics/#cmdline






>  > Actually the -monochrome should come after the reading of the input.
>
>What is the difference betwee having -monochrome in the front and at
>the back? Thanks!