Switching opera desktop to hand held mode for testing
Neat little tip I found (in my old, old blog archives) is that you can switch Opera into hand held emulation mode by hitting Shift+F11.
It’ll take your site and serialize the design to fit on a small screen like on your phone:

It also will honour the @media handheld stylesheet so it’s a convenient way to test the stylesheet without having to actually load it on a mobile device.
Sadly since Opera mini doesn’t look at the stylesheet unless you tell it to in the settings and my default Nokia browser ignores it all together I’m not sure how much use the @media handheld command is. Maybe it’s something that’ll have better support in the future. Maybe it’ll go the way of WAP.

May 20th, 2009 at 5:17 am
Now it’s done by going to the View menu and choosing Small Screen.