@item show debug frame
Displays the current state of displaying @value{GDBN} frame debugging
info.
+@kindex set debug observer
+@item set debug observer
+Turns on or off display of @value{GDBN} observer debugging. This
+includes info such as the notification of observable events.
+@kindex show debug observer
+@item show debug observer
+Displays the current state of observer debugging.
@kindex set debug overload
@item set debug overload
Turns on or off display of @value{GDBN} C@t{++} overload debugging