Keyboards are often tailored to the characters used in a language. Select a layout that conforms to the keyboard you are using, or select something close if the keyboard layout you want isn't represented. Once the system installation is complete, you'll be able to select a keyboard layout from a wider range of choices (run kbd-config as root after you have completed the installation). Move the highlight to the keyboard selection you desire and press &enterkey;. Use the arrow keys to move the highlight — they are in the same place in all national language keyboard layouts, so they are independent of the keyboard configuration. An 'extended' keyboard is one with F1 through F10 keys along the top row. There are two keyboard layouts for US keyboards; the qwerty/mac-usb-us (Apple USB) layout will place the Alt function on the Command/Apple key (in the keyboard position next to the space key similar to Alt on PC keyboards), while the qwerty/us (Standard) layout will place the Alt function on the Option key (engraved with 'alt' on most Mac keyboards). In other respects the two layouts are similar.