Variables browser does make difference between parameters and variables

[massimo ceraolo]

In variables Browser state variables and parameters have a box that allow selecting a value. In the first case it is an initial value, in the latter it is the value to be held constant during simulation.

When the user runs a complex model (especially if he has not developed it himself) he might not be immediately aware whether a variable is a parameter or a state variable. I would recommend to distinguish the two cases graphically.

Moreover there is no need to plot parameters.

So, to make visual difference between parameters and state variables, the best solution seems to be to make parameter non-selectable for plotting, i.e. without check box or with check-box disabled.
I hope this is possible with a limited effort.