[[Image:FDTD21(1).png|thumb|450px|Moving objects from one FDTD material group to another.]]
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 '''{{key|Shift Key''' }} key or '''{{key|Ctrl Key'''}} key , make sure that you continue to hold the keyboard's '''{{key|Shift Key''' }} key or '''{{key|Ctrl Key''' }} key down while selecting the destination material group's name from the contextual menu.
In a similar way, you can move one or more objects from an FDTD material group to one of [[EM.Cube]]'s other modules. In this case, the sub-[[menus]] of the '''Move To >''' item of the contextual menu will indicate all the [[EM.Cube]] modules that have valid groups for transfer of the selected objects. You can also move one or more objects from [[EM.Cube]]'s other modules to a material group in EM.Tempo.