The Code Coverage Browser helps you to work on a large number of source files from which you have collected code coverage information. See the LispWorks User Guide and Reference Manual for the steps to generate this data.
The tool displays a list of the files in the data with some code coverage statistics, and allows you to open the files in the Editor with or without code coverage coloring.
To facilitate working on many files, the tool allows you to save copies of the data which contain only a subset of the files. For example, you may decide that you have finished with some of the files, save a subset excluding these files and start next time using this new subset. Another possible use is when a team works on the data: you can create subsets of the files for each person to work on.
The tool also allows you to traverse (examine) all occurrences of a specific state, for example all occurrences of uncovered code.
LispWorks IDE User Guide (Unix version) - 13 Sep 2017