Using a Web Page Editor
Web Tools supports Web Page Editor for both edit and preview of the code.
To use a web page editor
In the Object List Editor, locate the web page that you want to modify.
Click Preview (the eye-shaped icon) to preview the design in the same page as the object.
Note: You can make changes to the web page in its record.To save your changes to the web page or exit the preview, step off the record.