how to UNHIDE (show) buddy icon in chat window?

[Greg]

i can't seem to find a way to UNHIDE the buddy icon in the chat window
(using 2.5.2 in Ubuntu).  if i right-click on a buddy's icon, i can
save it or hide it, but once it's hidden, i can't seem to right-click
to have the option of showing it again.  for some buddies, i'm sure
that i never hid the icon in the first place yet it isn't showing at
all (but i know that they have one since when using pidgin on windows
at work, i can see the icon).