need some help oops

ok so

i'm stupid and haven't touched profile editing in a while

but like how do you do that hidden scroll box again? i just need the line of code pls

i have the regular scroll box code still down and i know how to do that

bUT when i do what i t h o u g h t was the hidden one, it just gave me the regular one,,

like am i suddenly not allowed to do hidden?? 

pls help me i am confusion