bs-configurations

bs-configurations is a variable defined in `bs.el'.
Its value is

(("all" nil nil nil nil nil)
 ("files" nil nil nil bs-visits-non-file bs-sort-buffer-interns-are-last)
 ("files-and-scratch" "^\\*scratch\\*$" nil nil bs-visits-non-file bs-sort-buffer-interns-are-last)
 ("all-intern-last" nil nil nil nil bs-sort-buffer-interns-are-last))

Documentation:
List of all configurations you can use in the Buffer Selection Menu.
A configuration describes which buffers appear in Buffer Selection Menu
and also the order of buffers. A configuration is a list with
six elements. The first element is a string and describes the configuration.
The following five elements represent the values for Buffer Selection Menu
configuration variables `bs-must-show-regexp', `bs-must-show-function',
`bs-dont-show-regexp', `bs-dont-show-function' and `bs-buffer-sort-function'.
By setting these variables you define a configuration.

You can customize this variable.