How to export KiCAD schematic PDF using kicad-cli

Since KiCAD 7.0, you can use the kicad-cli command line tool to export a colored schematic PDF from a KiCAD project.

First, find out what the filename of the main schematic file is. Typically, if your project is named MyPCB.kicad_pro, your main schematic file is named MyPCB.kicad_sch.

Now you can export the schematic PDF using

kicad-cli sch export pdf MyPCB.kicad_sch

This will output, for example

Plotted to '/home/uli/MyPCB/MyPCB.pdf'.

Done.

The PDF file from the output contains your schematic PDF.