Ever wonder why you sometimes see a letter underlined on a NetSuite tab or field? NetSuite is providing an easy way to identify how to navigate to that tab or field using a keyboard shortcut. When you see a tab with the letter I underlined, trying pressing Alt-I (or on a Mac, control-option-I). Checkout this 30-second video demonstrating the functionality.
One additional thing: Alt-G (control-option-G) will take you to the global search wherever you are.