File → Print... (F P or Ctrl+P) will open a standard GTK printing dialog. Choose your print destination, a file to print to, or a printer, change printing settings if needed and go ahead. If you print to a file, you can choose the file format, e.g. PDF or PostScript. The button ‘Print Preview’ lets you see the preview of your page when it is printed.
Note: GTK2 and GTK3 standard printing dialogs may support different output formats.
Note: You can also output PDF with the File → Write Image... menu (see below) or export your schematics and symbols with the
lepton-clicommand (see lepton-cli export).
File → Write Image... (F I) is used for
exporting schematic and symbol pages as images. In the export dialog
box you can choose one of several supported image format options,
including PDF, as well as one of predefined size of the image, and
whether the image should be colored or black-and-white. The sizes are
not relevant for PDF files, those will be sized to fit the visible
contents of your schematic or symbol page. The lepton-cli utility allows
more accurate control of the image properties so if you want to set
some custom options, please use it (see lepton-cli export).