GMenu.image_menu_item ?stock ?label ~packing:menu#append () in
let check = add_menu_item ~label:"Check" () in
let reductions_menu_item = GMenu.menu_item ~label:"βδιζ-reduce" () in
+ let tactics_menu_item = GMenu.menu_item ~label:"Apply tactic" () in
menu#append reductions_menu_item;
+ menu#append tactics_menu_item;
let reductions = GMenu.menu () in
+ let tactics = GMenu.menu () in
reductions_menu_item#set_submenu reductions;
+ tactics_menu_item#set_submenu tactics;
let normalize = add_menu_item ~menu:reductions ~label:"Normalize" () in
let reduce = add_menu_item ~menu:reductions ~label:"Reduce" () in
let simplify = add_menu_item ~menu:reductions ~label:"Simplify" () in