(4)-c. Convert
The Convert function is used to make all fields on a layout read-only.
This is useful to make page for viewing records that has the same look and feel as a page created for editing and creating new records.
After clicking the "Convert" menu entry, a dialog will prompt you for the Visualforce page name and Apex class name of the new read only page.
Input the Visualforce page name and Apex class name and click OK to generate the new read-only page.