http://help.opera.com/Linux/9.50/en/keyboard.html
ty chces dosiahnut opak, robi sa to tiez tam. V novej opere (default v 9.5 je to zakazane)Single-key shortcuts
Opera 9.5 disables the following single-key shortcuts, which were enabled by default in Opera 9.2 and previous. To re-enable these shortcuts, check the box marked "Enable single-key shortcuts" in Preferences > Advanced > Shortcuts.