menu window length issue

when i use illustrator in 2nd monitor, the menu window length gets short to match the height of the first monitor. so to use bottom function of the menu window, i need to keep click the arrow. it's bit annoy and i can't check all the fuction at once. is there any advice about this problem?

+ if i move illustrator to first monitor it works fine. but I usually run a differ program on the main(first) monitor, so I usually run illust on the second monitor.

thank you for reading this 😄