To add a new dielectric or magnetic material group to a project, right-click on "Dielectric/Magnetic Materials" on the Navigation Tree, and select "Insert New Dielectric..." From the Dielectric Dialog, you can change the default green color of a material group or set the values of the material [[parameters]].
{{Note| Excluding surface and [[Curve Objects|[[Curve Objects|[[Curve Objects|[[Curve Objects|[[Curve Objects|[[Curve Objects|[[Curve Objects|[[Curve Objects|[[Curve Objects|curve objects]]]]]]]]]]]]]]]]]], you can define any solid object as a dielectric or magnetic material object.}}
[[Image:MORE.png|40px]] Click here to learn more about '''[[Defining Materials in EM.Cube]]'''.
In EM.Ferma, the Poisson or Laplace equations are solved subject to boundary conditions using the Finite Difference technique. As a result, you need to specify a finite computational domain and then specify the domain boundary conditions. EM.Ferma's computational domain defines where the domain boundary condition will be specified. A default domain box is always placed in the project workspace as soon as you draw your first object. The domain can be seen as a blue cubic wireframe that surrounds all of the CAD objects in the project workspace.
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[[Image:qsource2.png|thumb|400px|The blue wireframe around the CAD objects defines the extents of the computational domain. The specified boundary conditions are applied on the domain walls. ]]
To modify the domain settings, click the Domain button of the Simulate Toolbar or right-click on "3D Static Domain" entry in the Navigation Tree and select "Domain Settings..." from the contextual menu. In the Domain Settings Dialog, the computational domain can be defined in two different ways: Default and Custom. The default type places an enclosing box with a specified offset from the largest bounding box of your project's CAD objects. The default offset value is 20 project units, but you can change this value arbitrarily. The custom type defines a fixed domain box by specifying the coordinates of its two opposite corners labeled Min and Max in the world coordinate system.
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<td> [[Image:Qsource5.png|thumb|250px300px|EM.Ferma's Domain Settings dialog.]] </td><td> [[Image:fermbc.png|thumb|250px300px|EM.Ferma's Boundary Conditions dialog.]] </td><td> [[Image:Qsource4.png|thumb|250px300px|EM.Ferma's Mesh Settings dialog.]] </td>
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<td> [[Image:Qsource2.png|thumb|300px350px|Geometry of a spherical charge source and the enclosing domain box.]] </td><td> [[Image:Qsource3.png|thumb|300px350px|Fixed-cel mesh of the spherical charge object.]] </td>
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