The Works > Slots > Attributes submenu allows you to apply the standard action commands (described in Operations available) to the attributes rather than the values of those attributes.
For example, the Works > Slots > Attributes > Inspect command causes the Inspector to view the attributes, rather than the values, of the selected slots. This is useful when inspecting hash tables or lists, since the attributes (keys) might be composite objects themselves.
LispWorks IDE User Guide (Windows version) - 25 Nov 2011