4-11 Convert a Page to a Reference Page
You can convert all editable fields on a page to be read only in one quick function by clicking the Convert link under the Tool menu.
【Input page】
After clicking on Convert a warning message will appear.
If you would like to keep the original editable page, please make sure to use a different Visualforce Page name and Apex Class name.
【Reference Screen】
After the read only screen is made, deploy it to Salesforce per the usual process outlined in 4-3⑤ above.