# Remove all internal edges

**URL:** <https://community.freefem.org/t/remove-all-internal-edges/1353>\
**Category:** General Discussion\
**Created:** [November 26, 2021, 1:58pm UTC](https://community.freefem.org/t/remove-all-internal-edges/1353 "2021-11-26T13:58:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Loic](https://avatars.discourse-cdn.com/v4/letter/l/e9c0ed/32.png) [@Loic](https://community.freefem.org/u/Loic)\
**Post date:** [November 26, 2021, 1:58pm UTC](https://community.freefem.org/t/remove-all-internal-edges/1353/1 "2021-11-26T13:58:14Z")

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Hello all,

How could I remove all internal edges from a meshed domain to keep only the border of the domain ?

I have tried with the function **change** with **"rmInternalEdges=true**", but it does not work.

Thank you in advance,

Best regards,

Loïc,

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**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [November 26, 2021, 4:06pm UTC](https://community.freefem.org/t/remove-all-internal-edges/1353/2 "2021-11-26T16:06:37Z")

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See `FreeFem-sources/examples/3dCurve/buildParametricMeshL.edp`.