Overriding Tabs Using a Standard List Controller

Pages that use standard list controllers can be used to override tabs. For example, if you create a page named overrideAccountTab that is associated with the Account standard list controller:

<apex:page standardController="Account" recordSetVar="accounts" tabStyle="account">
  <apex:pageBlock >
    <apex:pageBlockTable value="{!accounts}" var="a">
      <apex:column value="{!a.name}"/>
    </apex:pageBlockTable>
  </apex:pageBlock>
</apex:page>

Then, you can override the Account tab to display that page instead of the standard Account home page.

To override the tab for Account:

From Setup, click Customize | Accounts | Buttons, Links, and Actions.
Click Edit for the Accounts Tab.
From the Visualforce Page drop-down list, select the overrideAccountTab page.
Click Save.

Note

Make sure you have made this page available to all your users by setting the page level security appropriately.