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[[Image:WMOM1MOMTUT3 7.png|thumb|350px400px|The Line object's property dialog.]]</td><td>[[Image:WMOM2.png|thumb|200px|The drawn Line object.]]</td></tr></table> Since the center frequency of the project is 1GHz, the operating wavelength is: <math> \lambda_0 = \frac{c}{f} = \frac{3e+8}{1e+9} = 0.3m = 300mm </math> For your resonant dipole to be half-wave, it can be approximated at 150mm. {{Note|If you have a mouse with a scroll wheel, you can use the scroll wheel to zoom in or zoom out while you draw the line. You can also rotate the view using the right mouse button, or pan the view using the right mouse button while holding the keyboard’s Shift Key down.}} Once your drawing is complete, you can zoom to fit your structure into the screen using the keyboard shortcut <b>Ctrl+E</b> or by clicking the Zoom Extents [[Image:fdtd_zoomextents.png]] button of View Toolbar. After you have rotated or panned the view, you can always restore [[EM.Cube]]’s standard perspective view using the keyboard’s <b>Home Key</b> or by clicking the <b>Perspective View</b> [[Image:fdtd_perspective.png]] button of View Toolbar.  In [[EM.Cube]]’s [[MoM3D Module|MoM3D Module]], objects are grouped together and organized by material under the “Physical Structure” node of the Navigation Tree. Since you selected no material for your line object, the first drawn object is automatically assigned a PEC_1 material group. The default perfect electric conductor (PEC) group is set as the active material. When a material group is set as active, its name appears in bold letters, and all subsequently drawn objects will be placed under that material node. Any material group can be set as the active material by right-clicking on its name in the Navigation Tree and selecting <b>Activate</b> from the contextual menu. All the wire objects or wireframe object belonging to the same PEC group have the same color and the same wire radius. To see this, right-click on the name of PEC_1 and select <b>Properties...</b> from the contextual menu. The PEC dialog opens up, where you can see the default name, default red color and the default radius wire of 0.003 units. At the center frequency of 1GHz, the default radius wire is 0.001&lambda;₀. From this dialog, you can change the name, color and wire radius of the PEC group.  <table><tr><td>[[Image:WMOM21.png|thumb|350px|The Physical Structure section of the Navigation Tree.]]</td><td>[[Image:WMOM20.png|thumb|300px|The PEC Dialog.]]