LUCAS enables the user to run simulations based on a pre-defined set of environmental conditions called scenarios. The simulations demonstrate how the landscape conditions will change based on the information specified in the appropriate scenario file, including the Transition Probability Matrix (see Section 1.2). There are a number of variables which must be set by the user before the simulation can begin. These variables are input by the user on the LUCAS Setup Menu. A description of the implementation of each variable selection on the Setup Menu is presented in the following subsections.