Question:

How do I filter out all packages except for the one I am currently working on, so that when I compile, only the single package is compiled?

Answer:

In this case, use the <Project Source> node in the Project Pane to filter all packages. To do this, right-click the <Project Source> node and choose: Apply Filter | Exclude Package and Subpackages. This will cause a new node to be created in the Project Pane, called "Package Filters." Then, open this node and navigate to the specific package that you wish to work on. When you find it, right-click it and choose: Apply Filter | Include Package (and Subpackages).