One click full train one kind of troops in a barrack

[Sunheng]

Full train a kind of troop in a barrack by one click.
create a new symbol on troops picture in barracks, so when the symbol is clicked, the troops behind that symbol will be training fully in a barrack.
Example: a lvl 9 barrack, when click that symbol on Barbarians, 60 barbarians will be training.

[firestar123]

I hate to be the sad dude that misclicks the goblins on a boosted barracks.