Customize the default mobile scaling factor to a maximum of 4X. This setting affects the 'viewport' metadata tag, which by default is set to 2X scaling with the following string:
"width=device_width, initial-scale=2.0, maximum-scale=4.0"
You can use the setting FRMMOBILE004 (MOBILE_BROWSER_SCALING) to adjust the zooming requirements for the mobile devices.
Notes
For more information on the supported scaling parameters, go to: http://developer.apple.com/library/safari/#documentation/AppleApplications/Reference/SafariHTMLRef/Articles/MetaTags.html