The Graphical Interface Modul (GIM) provides several possibilities to display information about the code in a graphical way.
At any time the nodes of the graphs are moveable, the user can group several nodes together, move them, hide them or "shrink" them into one node with a label which is given by the user (the user can group parts of the code together and mark them e.g. as "done"). Graphs like the callgraph can be displayed as graphs or trees. The treemode makes it easier to follow a kind of path from a caller to a callee. The graphmode is a more compact form of displaying graphs where some subprograms are called very often from different locations.
Various other options help to make huge graphs more compact so that the user can have portions of the graph displayed in which he is interested (e.g. layermode).