freesewing/markdown/org/docs/various/notation/strokes/en.md

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Line widths and strokes

Designers can, if they so choose, override the default line widths or set a specific stroke. They might do that to add additional info, like where to fold a pattern, or the outline of where a pocket would go.

For reference, here are the different available line widths:

The different line widths

And these are the different stroke styles:

The different line strokes