You can choose whether or not to run the Generator.
You can choose to view the input and output of each sub-module in the Analyzer or Generator. For instance if you select 'Lexifier', then all the inputs to the Lexifier and all the outputs produced by the Lexifier will be shown in the Trace Output window. You may select any combination of modules that you wish.
Finally, you can choose to view the output of each rule that succeeded, or each rule that tried to succeed (even if it failed.) For example, selecting 'Grammar / Tried' causes every grammar rule that the Analyzer tries to execute to print its output to the Trace Output window. Selecting 'Grammar / Fired' is similar, but only the grammar rules that are successful are shown.