# Uniting two triangles

In SMESH you can union two neighboring triangles (cells) by deletion of the common edge.

To unite two triangles:

1. From the Modification menu choose the Union of two triangles item or click button in the toolbar. The following dialog box shall appear:

2. Enter the ID of the required edge in the Edge field or select this edge in the 3D viewer.

3. Click the Apply or OK button.