+1. In Xubuntu with XFCE 4.12 in spanish language, I must press <ALT>D L L <ENTER> to put or remove the read only status. The first "L" is for "Ajuste de **L**ínea" (line adjustment) and the second "L" is for "Sólo **L**ectura" (read only). Both items have the "L" underlined. Thanks.