External edges are frequently used in 2D and external faces are occasionally used in 3D in the definition of model excitations and boundary conditions. For this reason, a quick selection method especially in geometrically complicated cases may speed up the application of boundary conditions. Maxwell usually uses a vacuum or air region encompassing the project objects. Boundary conditions are usually applied on external boundaries of this object and faces touching these boundaries. Note that Maxwell automatically applies a default boundary condition in 3D which is sufficient in many cases as long as the boundary is sufficiently far to allow for fringing flux. One option for selecting all edges is to select the outer domain object, and then use the menu Edit > Select > All Object Edges. This will select all the object edges in one command. You can then deselect individual edges one at a time by clicking them in Edge selection mode (details on selection mode below). The quickest graphical selection method consists of two steps. First step is making visible the required project objects only. Second step lies in the selection on this subset by dragging a rubber box over them. Please refer to the document for an explanation of the procedure. Keywords: Maxwell, Selection, External edges, External faces, Boundary conditions, ANSYS Electronics Desktop<\/p>\n