The Actions area contains a number of options allowing you to choose which actions you want to perform, thereby allowing you to create system plans.
The Compile , Load and Force check buttons can be selected or deselected as desired. Note that at least one of Compile and Load must always be selected.
Click Recompute Events to create a new plan for the specified options. You should click this button whenever you change the Compile , Load , or Force options, or whenever you change any of the files in the system or any of its subsystems.
Click Execute Events is used to execute the events currently selected in the main area. Notice that this button is only enabled.when some event is selected in the plan. See Executing plans in the preview view below for details.
LispWorks IDE User Guide (Macintosh version) - 25 Nov 2011