To determine the optimal thermal behavior of a cartridge during a simulation you have to modify the geometry of cartridge and sample, e.g. vary diameter and length of the sample. Furthermore, the geometry has to be modified, if you want to create additional regions for assigning more materials or to refine the mesh inside the furnace or the SCA.

In CrysMAS you usually change drawings rather than create them from scratch. You select elements and move them or you add points and lines. Editing geometries is only possible in Geometry Mode.