To see the current value of a parameter that interests you in the Interactive Optimizer, use the command display settings. The command display settings changed lists only those parameters where the value is not the default value. The command display settings all lists all parameters and their values.

To change the value of a parameter in the Interactive Optimizer, use the command set followed by options to indicate the parameter and the value you want it to assume.

In the reference manual of ILOG CPLEX Parameters, you will find the name of each parameter and its options in the Interactive Optimizer, along with the name of the parameter in Concert Technology and the Callable Library. That manual also describes the purpose of each parameter and documents its possible settings.

In the reference manual of the ILOG CPLEX Callable Library, the group optim.cplex.manageparameters documents the Callable Library routines that access parameters.