To set the Salesforce API and Visualforce version for a Visualforce page or custom component:
-
Edit a Visualforce page or component and click Version
Settings.
You can only modify the version settings for a page or custom
component on the Version Settings tab when editing the page or component in Setup.
- Select the Version of the Salesforce API. This is also the version of
Visualforce used with the page or component.
- Click Save.