[support] advanced forum: how can I split answers to pages?

Hi,

I'm using advanced_forum module, and I am quite satisfied, except for one thing:

I have noticed, all answers are on the same page. If a certain forum-topic has 45 answers, they are all on the same page, that page is quite long and if there are many pictures, it takes long time to generate the page. How could I force advanced_forum to split answers let's say to 20 per pages?

I checked Administer > Content management > Forums and there is "Topics per page: 25". But I did not find anything like "Answers per page", or "Replies per page". I also checked advanced_forum settings, but did not find anything relevant...

Jarry