The control center allows the user to apply several algorithms to modify the placement of the cells. The user can choose to randomize the layout, perform a simple mincut placement on it, or run simulated annealing algorithms. The cost function which the annealing algorithm seeks to minimize can be chosen as well. In addition, a greedy version of the annealing algorithm can be executed, which is significantly faster than the full algorithm, and four memory locations are provided for storing old layouts for future reference. The layout display shows the physical layout of the cells and nets.
Nets are color coded according to the length of the half perimeter of their bounding boxes.
It also allows manual editing of the layout. The histogram display gives a quick way to evaluate the quality of a layout. The nets are binned according to the size of their bounding boxes, and colored corresponding to their color in the layout display. The number of longer nets is plotted in red on the right side of the creen, the medium length nets in grey in the middle, and the shorter nets in blue on the left. Thus, a chart with bigger blue and grey bars is better than one with high red bars.