Use this window to change the settings of the Window List panel. See: Window List.
Sort List By
Sorts the window list by either most recently usage, or by name.
Include open files without windows
This will include files that are open, but not visible in a window. Sometimes Source Insight open files in the background for symbol resolution or other reasons. For example, a file might be open and visible in the Context window, even though you didn't explicitly open it.
Show current symbol
This will show the nearest symbol at the cursor position in each window.