Don't know what platform you are on, but on Mac with the GUI version, standard cut-copy-paste keybindings all work, as well as select-all, save, close window (C

Don't know what platform you are on, but on Mac with the GUI version, standard cut-copy-paste keybindings all work, as well as select-all, save, close window (Cmd + w), undo. Obviously they don't work in terminals.