changing properties dialogue

[Alan G Isaac <aisaac american edu>]

Suppose I insert an ER shape:
say an entity.
I double click on it to change
the properties, most obviously
the name.
OK, to enter a new name I let
go of the mouse and type.

Now how do I complete the
dialogue without reaching for
the mouse?  (I believe I ought
to be able to Alt-o for OK,
but I cannot.  It takes a lot
of tabbing to get to OK.)

Thanks,
Alan Isaac

PS Is there any way to insert
a linebreak in an entity name?
If not, how about allowing some
escape sequence for this?