Настройка в xfce4-terminal горячие клавиши.
В новой версии xfce4 убрали редактирования горячих клавиш в терминале.

$ xfce4-terminal -V
xfce4-terminal 0.8.7.2 (Xfce 4.12)

Пришлось по травить время на поиск простейшей задачи.

$ grep -v ";" .config/xfce4/terminal/accels.scm
(gtk_accel_path "/terminal-window/goto-tab-4" "4")
(gtk_accel_path "/terminal-window/goto-tab-3" "3")
(gtk_accel_path "/terminal-window/goto-tab-1" "1")
(gtk_accel_path "/terminal-window/close-tab" "d")
(gtk_accel_path "/terminal-window/new-tab" "a")
(gtk_accel_path "/terminal-window/paste" "v")
(gtk_accel_path "/terminal-window/copy" "c")
(gtk_accel_path "/terminal-window/goto-tab-2" "2")
(gtk_accel_path "/terminal-window/goto-tab-5" "5")
(gtk_accel_path "/terminal-window/goto-tab-7" "7")
(gtk_accel_path "/terminal-window/goto-tab-9" "9")
(gtk_accel_path "/terminal-window/goto-tab-6" "6")
(gtk_accel_path "/terminal-window/contents" "")
(gtk_accel_path "/terminal-window/new-window" "z")
(gtk_accel_path "/terminal-window/goto-tab-8" "8")

После пере зайдем в терминал и клавиши активны.
В xfce4-terminal горячие клавиши настройка законченна.