> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/e3d-training-manual/building-the-model/general-modeling-theory/editing-model-geometry/sub-mesh-shells.md).

# Sub-Mesh Shells

How to subdivide selected shells into a specified number of segments along each edge.

**Modify > Sub-Mesh Shells** subdivides the selected shell(s) by using the user-specified number of segments along both edges of the shell(s).

![](https://3750289988-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlRZtG5Ynp58kYzLHYbR7%2Fuploads%2Fgit-blob-a99a8bda882506f147adeb076f1cdc2b67501fd7%2Fmesh%20shells%20start.jpg?alt=media)

leads to

![](https://3750289988-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlRZtG5Ynp58kYzLHYbR7%2Fuploads%2Fgit-blob-f30237a2bc6dece3309a2a8d448d289b54739b6f%2FMesh%20shells%20end.jpg?alt=media)

Remember that node numbers can be turned on for reference by clicking **View > Display Options > Shell Display Options > Shell Number**, or by using the ![](https://3750289988-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlRZtG5Ynp58kYzLHYbR7%2Fuploads%2Fgit-blob-886fc3311ad8d7ebbfea28c026a5761269bd1595%2FShell%20display%20options%20button.jpg?alt=media) button on the Quick Access Toolbar.

To relate node numbers to the reference corners 1 through 4 of a selected shell, click **Tables > Shells**.


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