This sheet represents the choice of modules and choice of functionality of the different modules. Not the different modules are linked to each other and that the appearance will shift while the user is modifying the values for the different options. Selection of some options will enable other options to be relevant for your simulation.
By default only options that have been selected to non default values are displayed. A Click on the upper left yellow button will change the appearance so all enabled options are displayed. A right click in the module grid column gives similar options for the specific module.
Note that the switches will enable both Parameters. Parameter Tables, Model Files and Output Variable sheets. Normally the Switches sheet is the first step in the design of a specific simulation. All these sheets have the similar basic classification of entities into different modules that contains the options that could be selected for the simulation