**Figure 12:** *The Modify Menu (PC)*

After starting Graph'O->Mat, you can only select the generate graph option. This generates a random graph. The 'Shuffle Graph' option takes the actual graph and sets the coordinates of every vertex to a random value. 'Modify Randomly' modifies your graph by deleting or adding random vertices and edges. If you like to know, if your graph will be bigger or smaller after modifying, you can either choose 'Modify More' or 'Modify Less'. This does the same as 'Modify Randomly' but it will either add *or* delete edges and vertices.