The Project window manages the source files that are associated with an open project file.
Summary
In Visual LISP, click Project 
Open Project. By default, a Project window is created for each open project. If the window for a project is closed, click the project name from the bottom of the Project menu to redisplay the window.
List of Options
- Project Properties
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Displays the Project Properties dialog box for the project.
This allows you to view the full path name of each file in the project, add, remove, and reorder project files, and set the project’s compiler options.
- Load Project FAS
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Loads the compiled (.fas) file for each of the AutoLISP source files listed in the project.
- Load Source Files
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Loads all the AutoLISP source files in the project.
- Build Project FAS
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Compiles all the AutoLISP source files in the project that have been modified since they were compiled last.
- Rebuild Project FAS
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Recompiles all project source files, whether or not they have changed since their last compile.
- Project Files List
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Each Project window line displays one of the AutoLISP source files that make up the project.
Right-click in the Project Files list to display a list of available options to manage the project or work with the selected AutoLISP source file.