By default, the first ten of your website posts show up per your post page. Unless you enable an infinite scroll, it will show your posts unchanged.
For some design customizations, you may want to decrease, or increase this number, and that's it – you are right at it. To change the value, go to your 'Website Setting' page. This is available on your dashboard.
Change the 'Post per page' value.
That's all! When you update the value, it will be saved right away.