Merging

The -merge operation allow the merging of several files into one. Ranges can be used to select only a subset of pages from each input file in the output. The output file consists of the concatenation of all the input pages in the order specified on the command line. Actually, the -merge can be omitted, since this is the default operation of cpdf.

Merge maintains bookmarks, named destinations, and name dictionaries.

Forms and other objects which cannot be merged are retained if they are from the document which first exhibits that feature.

The -retain-numbering option keeps the PDF page numbering labels of each document intact, rather than renumbering the output pages from 1.

The -remove-duplicate-fonts ensures that fonts used in more than one of the inputs only appear once in the output.