JSPX Design View shows 'boxes' instead of WYSIWYG

Question

For a particular project I've just created to examine/try some custom JSF tags, when I edit mypage.jspx file, I get a display of nested boxes instead of a WYSIWYG view of the mypage.jspx page.
This does not happen in a similar project that I've already completed & can display a .jspx from that project in a window next to the one displaying the boxes for mypage.jspx.
Any ideas how to get it to display correctly?
The code of the page that doesn't display correctly is below:
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
          xmlns:h="http://java.sun.com/jsf/html"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
  <jsp:directive.page contentType="text/html;charset=windows-1252"/>
  <f:view>
    <af:document binding="#{backing_login.document1}" id="document1">
      <af:form binding="#{backing_login.form1}" id="form1">
        <af:panelFormLayout binding="#{backing_login.panelFormLayout1}"
                            id="panelFormLayout1">
          <f:facet name="footer">
            <af:commandButton text="commandButton 1"
                              binding="#{backing_login.commandButton1}"
                              id="commandButton1"/>
          </f:facet>
        </af:panelFormLayout>
      </af:form>
    </af:document>
  </f:view>
  <!--oracle-jdev-comment:auto-binding-backing-bean-name:backing_login-->
</jsp:root>Edit: 10/26 2:20P - Spelling & small correction
Edit: 10/30 - Code Formatting

Answer 1

Doing this showed me that I was missing a library - JSTL.
I added the JSTL 1.2 library, then closed and re-opened the .jspx and am seeing the page correctly.
I am still getting an error when loading one of the 2 pages in the project. In this case an ADF/JSF only page. The page does display properly, but I get an error message in the log.
The error is:
Error in f:view.doEndTag while servicing /faces/results.jspx.
java.lang.NullPointerException
     at javax.faces.webapp.UIComponentClassicTagBase.popUIComponentClassicTagBase(UIComponentClassicTagBase.java:727)
     at javax.faces.webapp.UIComponentClassicTagBase.doEndTag(UIComponentClassicTagBase.java:1234)
     at com.sun.faces.taglib.jsf_core.ViewTag.doEndTag(ViewTag.java:241)
results.jspx contents... PanelStretchLayout, PanelGroupLayout, PanelLabel&Message, OutputText, CommandButton only.
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
          xmlns:h="http://java.sun.com/jsf/html"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<jsp:directive.page contentType="text/html;charset=windows-1252"/>
  <f:loadBundle basename="UIResources" var="UIRes"/>
  <f:view>
    <af:document>
      <af:form>
        <af:panelStretchLayout binding="#{backing_results.panelStretchLayout1}"
                               id="panelStretchLayout1">
          <f:facet name="bottom"/>
          <f:facet name="center">
            <af:panelGroupLayout binding="#{backing_results.group1}" id="group1"
                                 layout="vertical">
              <af:panelLabelAndMessage label="#{UIRes['results.label']}"
                                       binding="#{backing_results.panelLabelAndMessage1}"
                                       id="panelLabelAndMessage1">
                <af:outputText binding="#{backing_results.outputText11}"
                               id="outputText11"
                               value="#{labeledInputBean.name}"/>
              </af:panelLabelAndMessage>
              <af:commandButton binding="#{backing_results.commandButton1}"
                                id="commandButton1"
                                text="#{UIRes['results.button.text']}"
                                action="logout"/>
            </af:panelGroupLayout>
          </f:facet>
          <f:facet name="top"/>
          <f:facet name="start"/>
          <f:facet name="end"/>
        </af:panelStretchLayout>
      </af:form>
    </af:document>
  </f:view>
  <!--oracle-jdev-comment:auto-binding-backing-bean-name:backing_results-->
</jsp:root>Edit: Formatting