Is there a way to restrict the buttons on a standard page to be displayed top or bottom only ?

Generally we will be displaying buttons on both bottom and top of the page using below code

Code

<apex:page standardController="lead" extensions="appointmentcontroller">

  <apex:form>

      <apex:pageBlock> 

          <h1>Congratulations</h1>

          This is your new Page

           <apex:pageBlockButtons>

                   <apex:commandButton action="{!saveAndCongrat}" value="Save" reRender="test"/>

                   <apex:commandButton value="Cancel" action="{!cancelredirect}" />         

           </apex:pageBlockButtons>

       </apex:pageBlock>

   </apex:form>

</apex:page>

Output

What if you want to display button only on top or only on bottom ? then change the above code to below format by adding location attribute where you can specify top, bottom, or both - it defaults to both in pageBlockButtons

Code

<apex:page standardController="lead" extensions="appointmentcontroller">

  <apex:form>

      <apex:pageBlock> 

          <h1>Congratulations</h1>

          This is your new Page

           <apex:pageBlockButtons location="bottom">

                   <apex:commandButton action="{!saveAndCongrat}" value="Save" reRender="test"/>

                   <apex:commandButton value="Cancel" action="{!cancelredirect}" />         

           </apex:pageBlockButtons>

       </apex:pageBlock>

   </apex:form>

</apex:page>

Output