cmd+<Number>: switch to the tab

cmd+d: split panel veritically

cmd+shift+d: split panel horizontally

cmd+option+->/<- or cmd+{/}: switch between splitted panels.

cmd+->/<-: switch tabs.

cmd+enter: switch into/out full screen.

cmd+option+e: search content in all tabs.

cmd+T(custom): new tab

cmd+;: autocomplete, show all previous commands. Type some characters, then type cmd+;

cmd+f: search and copy to clipboard.

###Tips

You can custom your key shortcuts in iTerms->Preference->Keys.