With PSLTSCALE on (the default), dashes of model-space objects seen through a viewport keep their paper-space length whatever the viewport scale; before, a 1:100 viewport drew them 100 times too short, so dashed lines looked solid in layouts and PDF plots. PSLTSCALE 0 keeps the old behaviour. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>