If on one hand ARES Commander under macOS includes the command ExportPDF, this command will allow always the plot/output of the entire drawing: The user is unable to specify a printing area or scaling factor.

Due to this limitation of the command, we recommend the install of the free PDF-Cups driver or PDFWriter for Mac (which is also based on Cups).
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After the Installation of the driver you can print via the PRINT command directly as expected/like other print outputs.