How do I change Archives layout ?

Apologies if this one is a bit dumb as I'm new to Blogging !

I have my posts archive in the right frame of my blog and it is in the default format of month by month grouping. However, I simply want each post listed by title instead as the date is irrelevant for my blog - only the post title matters.

I've tried to change things in the admin panel by setting "postbypost" instead of "date" but it has no effect.

Any help appreciated !