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File Layers Meaning
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*.cmp Top, Via, Pad Component side
*.ly2 Route2, Via, Pad Inner signal layer
*.ly3 Route3, Via, Pad Inner signal layer
... ...
*.sol Bot, Via, Pad Solder side
*.plc tPl, Dim, tName, Silkscreen comp. side
*.pls bPl, Dim, bName, Silkscreen solder side
*.stc tStop Solder stop mask comp. side
*.sts bStop Solder stop mask sold. side
*.drd Drills, Holes Drill data for NC drill st.
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