# Blend Edge Blend Edge The BlendEdge command creates a curvature-continuous blend surface between polysurface edges with varying radius values. The polysurface is trimmed and joined to the blend.
#### Steps 1. Select edges. Or, double-click an edge to select tangent edges. 2. Edit radius handles and options. #### Command-line options -ShowRadius * Yes: Displays radius handles in the viewport. * No: Hides radius handles in the viewport. A hidden radius handle will display when the mouse cursor is close to it. -NextRadius: Specifies the radius for the next edge. -ChainEdges: Automatically selects connected edge based on continuity.
-FaceEdges: Pick a face to select its boundary edges. Tangent edges are excluded.
-PreviousEdgeSelection: In cases where the command is canceled or ended prematurely, the PreviousEdgeSelection option re-selects the previously selected edges. Supports multiple sets of previously selected edges for up 20 previous edge sets. -TrimAndJoin: Trims and joins the resulting surface to the input surfaces. [History ](https://docs.mcneel.com/rhino/8/help/en-us/commands/history.htm)only works if TrimAndJoin=No -SelectEdges: Allows selecting more edges after the selection has been closed. -Preview: Displays a dynamic preview. You can change the options and the preview will update -Edit: Edit the most recent selected set of edges. * "Tip": When no command is running, double-clicking the object is the alternative way to start the editing mode. * To edit edges 1.Select the object to edit. The editable edges highlight. 2.Edit the size of the handles. 3.Click the SelectEdges option. 4.Use Shift + click to add edges. Use Ctrl + click to remove edges. Remove all edges in the most recent edge set to return to the previous edge set.
Tip: Radius and Distance options appear on the command line when you drag a handle grip. #### Radius/Distance options -FromCurve: Select a curve. The radius of the curve at the picked location will be used. -FromTwoPoints: Pick two points to show the radius distance. #### Handle options -AddHandle: Adds a handle along the edges. -CopyHandle: Adds a new handle using the distance from the selected handle. -RemoveHandle: Visible only when at least one handle has been added. -SetAll: Sets the distance or radius for all handles. -LinkHandles: Editing a single handle updates all handles #### RailType options -DistFromEdge: The distance from the edge curves determines the intersection. -RollingBall: The radius of a rolling ball determines the intersection. -DistBetweenRails: The distance between the edge rails determines the intersection -Preview: Displays a dynamic preview. You can change the options and the preview will update. -Edit: Allows changing the radius of existing blends. For more information, please refer to the [Rhino documentation](https://docs.mcneel.com/rhino/8/help/en-us/commands/blendedge.htm#\(null\)).