Custom Component

Custom Component A reusable piece of Visualforce page code that can be used in multiple different pages. Setup >> Develop >> Components Give component name as recordDisplay  <apex:component>     <apex:attribute name="record" description="The type of record we are viewing." type="Object" required="true"/>                          <apex:pageBlock title="Viewing {!record}">           <apex:detail />     </apex:pageBlock> </apex:component> It can be used in any page like following <apex:page >   <c:recordDisplay record="Account" /> </apex:page>  Note: use record id in URL Or in another page like <apex:page>   <c:recordDisplay record="Contact" /> </apex:page>   Note: use record id in URL