pdfunite version 26.11.0 Copyright 2005-2026 The Poppler Developers - http://poppler.freedesktop.org Copyright 1996-2011, 2022 Glyph & Cog, LLC Usage: pdfunite [options] .. -v : print copyright and version info -h : print usage information -help : print usage information --help : print usage information -? : print usage information