Дополняя вежливым ответом , я добавил еще две команды:
Move Up 10 Extending Selection
со значением moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:, moveUpAndModifySelection:
и Move Down 10 Extending Selection
со значением moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:, moveDownAndModifySelection:
затем назначил ярлык в XCode: