An interface of a “list” buffer is similar to the interface provided by “package.el” (see Package Menu in The GNU Emacs Manual).
And here are the default key bindings (some of them may be rebound to more specific commands):
Mark the current entry (with prefix, mark all entries).
Unmark the current entry (with prefix, unmark all entries).
Display “info” interface for the marked entries (or the current entry if nothing is marked).
Sort entries by column specified by the prefix argument (counting from 0).