How to make more posts to show on fronpage for Pinbin theme

First of all, thank you for sharing this neat theme.
I was looking for the function that makes the pagination end at 10 posts per page but can find it.
I want to set it to show more posts in the index.

You can adjust pagination settings at WordPress dashboard – Settings – Reading – “Blog pages show at most”. You can set numbers of posts per page without any limits.