##

    keycodes:

    in grafic-window:
      Ctrl-S      Save
      Ctrl-Z      delete last created object
      Ctrl-Y      restore last deleted object
      Ctrl-P      redo last user-application

    in editor-window:
      Delete/Entf remove selected text
      Ctrl-Z      restore last removed text
      Ctrl-C      copy
      Ctrl-X      delete & copy
      Ctrl-V      paste

    in browser-window:
      -