# SelSubDEdges

## <img src="https://3375153115-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5uhW8FwQpXQj8tHUULMo%2Fuploads%2FiIXAcTJMRaUDAPjf0peL%2FG8_08_SEL_SUBD_EDGES.png?alt=media&#x26;token=ed18d890-3c9a-430c-b1fc-9b86919ded39" alt="" data-size="line"> SelSubDEdges <a href="#profiles" id="profiles"></a>

The SelSubDEdges command selects different types of edges on selected SubDs.

### **Steps**

1. Select SubD objects, press Enter.

   The command reports the numbers of different edge types.
2. Sets what types of edges to be selected.

   The command-line only shows the edge types that the selected SubDs have.

### Command-line options

#### **Smooth (Yes/No)**

Specifies whether smooth edges will be selected.

#### **Weighted (Yes/No)**

Specifies whether soft crease edges will be selected.

The SubDCrease command adds soft crease edges to SubDs.

#### **Crease (Yes/No)**

Specifies whether hard crease edges will be selected.

The Crease command adds hard crease edges to SubDs.

#### **Boundary (Yes/No)**

Specifies whether naked edges will be selected.

The MakeSubDFriendly command makes any curves SubD compatible.

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<div align="left"><img src="https://docs.mcneel.com/rhino/8/help/en-us/image/topic_illustrations/curve_zerocurvature.png" alt=""></div>

* A SubD friendly curve is a degree 3 uniform curve.
* The second control points on both ends are constrained and locked. These points display with the locked object color.
* The first and last three control points are always collinear to maintain zero curvature at both ends.
* Moving or deleting Control Points or Edit Points will not destroy the SubD friendly characteristic.
* SubD creation commands (SubDLoft, SubDSweep1, SubDSweep2...) create a better SubD object from SubD friendly curves.

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For more information, please refer to the [Rhino documentation](https://docs.mcneel.com/rhino/8/help/en-us/commands/crease.htm#SelSubDEdges).