To create a Quadrangle in the Main Menu select Model -> Add quad
There are 2 algorithms to create a Quadrangle.
Firstly you can define a Quadrangle through Vertex 1, Vertex 2, Vertex 3 and Vertex 4, which ares the points through wich the Quadrangle passes.
Arguments: 4 vertices
The dialogue box for the creation of a quadrangle from vertices is:
Add Quadrangle from vertices
Secondly you can define a Quadrangle through Edge 1, Edge 2, Edge 3 and Edge 4.
Arguments: 4 edges
The dialogue box for the creation of a quadrangle from edges is:
Add Quadrangle from edges
TUI command: Quadrangles