Enter the various ranges of each input parameter viz. Starting, Minimum, Maximum as given in the figure.
Stage Matrix
Select the Stage Matrix tab.
You find a matrix of parameters vs. stages, and symbols that visualize if parameters are found in input files.
Sampling Matrix
Select the Sampling Matrix tab.
If you don't want to use a parameter as variable for a respective sampling, the variables can be switched off here. The parameters are treated as constants then.