An important new feature in Internet Explorer is the ability it gives you to keep multiple Web pages open at the same time, each on its own tab. That way, you can leave a page open, open another page, and then easily and quickly move between pages.
If you have only a couple of open tabs, you can simply click one tab to switch to it. To see a list of open tabs, click the down arrow next to the Quick Tabs button.
"Opening Multiple Web Pages" on the facing page for information about opening Web pages on new tabs.