Remove Unused Sources

Background:

Each time you add a new data source (a project or data file) to your graph, the source's name and location is added to a list of sources stored in memory. You may choose from this list of sources in the Data Source section of the Properties panel of the Manage Curves dialog box. Even if your graph does not contain any curves using a source, the source is still in this list, available for future use.  

Removing Unused Sources:

Sometimes the list of sources may become too long or you may not wish to see all of your sources which you are no longer using. This command removes these unused sources from the list of sources stored in memory. The command does not remove any source data from your computer disk.