Any appearance of graphical objects in icons (like coordinates, color, and text) can
be controlled by parameters. You can have, for example, tanks where you can see the level when
simulating, and components changing color when, for example, an error occurs. Components with
this feature are displayed according to the parameter values also when not simulating.
For description on how to create parameter-dependent graphics in icons, see Controlling
Graphical Annotations of Icons by Parameters.