Groups are a powerful feature of MEDUSA4 used to collect geometry together so that it can be manipulated as a single entity. Adding structure to your drawing in this manner makes it much easier to edit at a later date. Since groups can have user defined names much intelligence can be built into the drawing. You can create a new group and then add geometry to it or form a group from existing elements. Geometry may be added to groups and edited or deleted from the group. To make it easy to understand what structure is within a sheet MEDUSA4 provides a structure browsing tree viewer tool to display and manipulate groups.