Zooming in Desktop Browsers?

Depending on your platform there are several ways of zooming. On most desktop browsers if your mouse has a scroll wheel then you can simply position the mouse over an area of interest and roll your mouse wheel bak and forth to enlarge or reduce the area under the mouse.

Zooming in mobile browsers?

On the iPhone and iPad browsers you can use the common "Pinch" gesture. Two finger "pinch" will zoom the page out for a broader view of the area under the pinch, the two finger "spread" gesture will zoom the page in for a closer more detailed view of the area under the spread. On Android devices please refer to the "On screen controls" info.

On screen controls?

Use your mouse to drag the area of interest to the center of the screen and then press the Magnifying Glass "+" to zoom in and "-" to zoom out. You can also double click to zoom in. As you zoom you can always drag the image around to view. As you move the image or change the zoom level the coarse image data will update quickly with fine details. Pressing the Home (House) button will return the image to the original full page view that was seen when first opening.