[otrs] what is AccessKey?

Hi OTRS Community! I found that there are some AccessKeys almost to every link or action in OTRS. The definition of access keys in otrs_developer_book http://doc.otrs.org/developer/2.2/en/html/ (p63) given like: AccessKey - short key (key+ALT) for a quick access over the keyboard. So if I understand correctly if you press on keyboard for example p+alt -> you would be redirected ti a preferences panel at NavBar. Unfortunately it doesn't work for me because my system or browser shortcuts are used instead of otrs :( Maybe I've missed something and accesskeys works another way? -- I've tried combinations on Firefox 2.X , IE 7 and Konqueror Thx for future answers %)