In this case, type several tabs to move the cursor in before entering your commands. The left side of the console might not be visible if you're not using a widescreen display.
The HUD will disappear and you will get a prompt ( |) in the lower left corner of the screen where codes can be input. (Example: §, ½ or | on Scandinavian (Swedish, Danish, Norwegian etc), caret ( ^) on German keyboards, ² on French ones, \ or | on Italian Keyboards, ' on Brazilian Keyboards, ' on Turkish keyboards). The key is the top left key under escape, on non-US keyboards.
Other keyboard layouts will differ, but the key is usually to the left of 1, and just under the Escape key ( Esc). The grave accent key shifts to tilde ( ~) on US keyboards, and the not symbol ( ¬) on UK keyboards. To access the console, use the grave accent key ( `) while in-game (Unpaused).