The graphical simulator control panel contains buttons and menus
corresponding to the commands available from the textual simulator
interface.  Additionally, the graphical version contains many features
for animating simulation runs.







Conditional breakpoints of arbitrary complexity can be set by placing
their conditions either in specific sections of particular models, or
based on global parameters and placed in the common <i>monitor</i> block.
In either case, the conditional evaluation should print a brief message
describing or identifying the break-point and then branch to a <i>halt()</i>
instruction.