Changes

If two or more material groups are defined in the Navigation Tree, only one of them can be active. By default, the last material defined is active. When you draw new objects, they are inserted under the active material node of the Navigation Tree, which is always listed in bold letters. Any material can be made active by right clicking on its name in the Navigation Tree and selecting the '''Activate''' item of the contextual menu.

You can move one or more selected objects to any other material group. Right click on the highlighted selection and select '''Move To > FDTD >''' from the contextual menu. This opens another sub-menu with a list of all the available material groups already defined in your [[FDTD Module]] project. Select the desired material node, and all the selected objects will move to that material group. The objects can be selected either in the project workspace, or their names can be selected from the Navigation Tree. 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.