JDeveloper, JSF and SelectManyMenu

Question

using Oracle JDeveloper 10.1.3...
wizard creates the following in jsp file......
<h:selectManyMenu
binding="#backing_chemDataEntry.selectManyMenu1}"
id="selectManyMenu1">
<f:selectItems value="#{compatibilityGroup.compatGrps}"
binding="#{backing_chemDataEntry.selectItems2}"
id="selectItems2"/>
</h:selectManyMenu>
page is rendered, corrrect list of items is displayed,
but the menu will not drop down and only shows one
item at a time.........
we want to display 3 items and have the rest in a drop
down menu........
if <h:selectManyMenu> is changed to <h:selectOneMenu>
then there is a drop down but again we are unable to
change size......
can anyone explain this behavior/problem and/or
provide a workaround or alternate method or
suggestions?
also why can't size be specified for a <h:selectManyListbox>?
we only want to display 3 even if there's 12 and provide
scrolling for the rest........
hoping for an answer,
jeanne

Answer 1

unfortunately, both the plain jsf and adf jsf articles do not fix or address the problem that I am asking about.......
all of the selectOne components render as expected,
the problem is only with selectManyMenu.....
within jDeveloper, selectManyMenu does not give a drop down
and generates an error when size is specified....
resolving the problem with the drop down is more important.......