Also Skype has some shorcuts. Usually, they are not checked, but you have only to check the "Enable Keyboard Shortcuts", in the Options Menu. It is also possibile to set your own shortcuts, modifying the default action. A shorcut is a combination of keyboard keys triggering an action. A kind and useful reference offered by MakeUseOf. This Guide is free but password-protected. Join MakeUseOf ( only an email address is needed ) to get the password. It will be emailed to you right after you have joined.