In [2.Region], you specify the region where the mesh will be created. If you enter the coordinates of a single point, the mesh will be created inside the closed surface enclosing the point.
To create a multi-region mesh, specify as many points as there are regions.
Clicking the (+) in the upper right corner creates a region, specifying the coordinates of the point and whether it is a fluid or solid. The coordinates of the points can be entered manually or by moving the mouse to the point where the light green lines in the graphics window meet.
Region setup