Visualforce Debug Pane

debug.jsp

<!-- the devconsole parameter is automatically set when a page is in refresh/preview mode from Developer Console
     which allows us to only display our custom viewstate debug pane when we're in Developer Mode! -->
<apex:pageBlockSection id="debug" title="Debugging" rendered="{!$CurrentPage.parameters.core.apexpages.request.devconsole == '1'}">
  <apex:pageBlockTable value="{!clients}" var="client">
    <apex:column value="{!client.Name}"/>
    <apex:column value="{!client.Enrollment_Status__c}"/>
    <apex:column value="{!client.Referral_Agency__c}"/>
    <apex:column >
      <apex:facet name="header">Saved</apex:facet>
      <apex:outputPanel rendered="{!NOT(ISBLANK(client.Id))}" layout="block"><input disabled="true" type="checkbox" checked="true"/></apex:outputPanel>
      <apex:outputPanel rendered="{!ISBLANK(client.Id)}" layout="block"><input disabled="true" type="checkbox" /></apex:outputPanel>
    </apex:column>
  </apex:pageBlockTable>
</apex:pageBlockSection>