Add an option to use the original filename plus the compressed dpi as the the output filename. For example, if the input file was named 'filename.pdf' then the compressed output file would be named 'filename.120dpi.pdf'.

Add an option to use the original filename plus the compressed dpi as the the output filename. For example, if the input file was named 'filename.pdf' then the compressed output file would be named 'filename.120dpi.pdf'.