To extrude from quadrangles in the Main Menu select Model -> Operation -> Extrude Quadrangles.
From a list of quadrangles, a set of hexahedra is created.
The dialogue box to make a simple extrude of quadrangles is:
Simple Extrude From Quadrangles
Arguments:
The direction of the extrusion is the vertical axis (Z axis).
TUI command: Simple Extrude
The dialogue box to make a uniform extrude of quadrangles is:
Uniform Extrude From Quadrangles
Arguments:
TUI command: Uniform Extrude
The dialogue box to make a custom extrude of quadrangles is:
Custom Extrude From Quadrangles
Arguments:
TUI command: Custom Extrude
To join quadrangles in the Main Menu select Model -> Operation -> Join Quadrangles.
Uniform Join Quadrangles Dialog Box
Arguments:
TUI command: Uniform Join
Custom Join Quadrangles Dialog Box
Arguments:
TUI command: Custom Join