Drawing multiple plots in one is simply possible by clicking on the variables that are to be plotted from the variables browser in the plotting perspective. Each variable has\r\na checkbox, checking it will plot the variable.

Depending on the type of plot you want you have to go for plotting either in plot window or parametric plot window. Under plot window, the variables are plotted over the simulation time whereas in parametric plot window, the variables are plotted between variables x and y, with y as a function of x.