Changes

Once a new material surface node has been created on the navigation tree, it becomes the "Active" material surface group of the project workspace, which is always listed in bold letters. When you draw a new CAD object such as a Box or a Sphere, it is inserted under the currently active material surface type. There is only one material surface group that is active at any time. Any material surface type can be made active by right clicking on its name in the Navigation Tree navigation tree and selecting the '''Activate''' item of the contextual menu. It is recommended that you first create material surface groups, and then draw new objects under the active material surface group. However, if you start a new [[EM.Tempo]] Illumina project from scratch, and start drawing a new object without having previously defined any material surface groups, a new default PEC surface group is created and added to the navigation tree to hold your new CAD object.