pages把頁面改成B4 - MAC

呃，選了設定頁面

卻只有A4、B5、JISB5、USLetter、USLegal可以選

有什麼方法可以把頁面調成B4的嗎@@?

--
This is GLee speaking... ◢██ ◢ ═════════════╤
The word "GLee" means... █ █ Ξ
Godzilla.Lee █ █ ◢█◤ ◢█◤
The man, who is... █ █◤ █ █▁ █▁
Ξ bleak., corrupt, desolate █ █ █ █ █ Deceased
╧═════════ and immaterial ◢██◤ ◢██◤ ◢█◤ ◢█◤ Geist

--