Click here to learn more about [[Block Types]].
[[Image:prop_manual-12_tn.png|thumb|600px|An imported external terrain model.]]
=== Importing & Exporting Terrain Models ===
You can also export all the terrain objects in the project workspace as a terrain file with a '''.TRN''' file extension. You can even import a DEM terrain model from an external file and then save and export it as a native terrain (.TRN) file. To export the terrain, select '''File''' > '''Export...''' from [[Propagation Module]]'s '''File Menu'''. The standard [[Windows]] Save Dialog opens up with the default file type set to '''.TRN'''. Type in a name for your new terrain file and click the '''Save''' button to export the terrain data.
[[File:prop_manual-12_tn.png|800px]] Figur: An imported external terrain model. === Transferring Moving Objects From Or To Other Modules among Block Groups ===
You can move one or more selected objects at a time among different material groups. The objects can be selected either in the project workspace, or their names can be selected from the navigation tree. Right click on the highlighted selection and select '''Move To > FDTD >''' from the contextual menu. This opens up another sub-menu with a list of all the available material groups already defined in your [[EM.Tempo]] project. Select the desired material node, and all the selected objects will move to that material group. In the case of a multiple selection from the navigation tree using the keyboard's '''Shift Key''' or '''Ctrl Key''', make sure that you continue to hold the keyboard's '''Shift Key''' or '''Ctrl Key''' down while selecting the destination material group's name from the contextual menu.