The base pairing probabilities are represented as a dot plot in which squares with an area proportional to Pij represent the the raw pairing probabilities, see Fig. 2. The dot plot is provided as Postscript file which is structured in such a way that the raw data can be easily recovered explicitly. RNAcofold also computes a table of monomer and dimer concentrations dependent on a set of user supplied initial conditions. This feature can readily be used to investigate the concentration dependence of RNA-RNA hybridization, see Fig. 3 for an example.