Web Finger Tips on iPhone: Zooming and Scrolling

source: OReilly - iPhone The Missing Manual

These two gestures—zooming in on Web pages and then scrolling around them—have probably sold more people on the iPhone than any other demonstration. It all happens with a fluid animation, and a responsiveness to your finger taps, that’s positively addicting. Some people spend all day just zooming in and out of Web pages on the iPhone, simply because they can.

When you first open a Web page, you get to see the entire thing. Unlike most cellphones, the iPhone crams the entire Web site onto its 3.5-inch screen, so you can get the lay of the land. At this point, of course, you’re looking at .004-point type, which is too small to read unless you’re a microbe. So the next step is to magnify the part of the page you want to read.
The iPhone offers three ways to do that:

• Rotate the iPhone. Turn the device 90 degrees in either direction. The iPhone rotates and magnifies the image to fill the wider view. (see image below)
  
• Do the two-finger spread. Put two fingers on the glass and drag them apart. The Web page stretches before your very eyes, growing larger. Then you can pinch to shrink the page back down again. (Most people do several spreads or several pinches in a row to achieve the degree of zoom they want.)
• Double-tap. Safari is intelligent enough to recognize different chunks of a Web page. One article might represent a chunk. A photograph might qualify as a chunk. When you double-tap a chunk, Safari magnifies just that chunk to fill the whole screen. It’s smart and useful. Double-tap again to zoom back out.

Once you’ve zoomed out to the proper degree, you can then scroll around the page by dragging or flicking with a finger. You don’t have to worry about “clicking a link” by accident; if your finger’s in motion, Safari ignores the tapping action, even if you happen to land on a link.

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