Do you want to change the Number of Posts Displayed On Your WordPress Blog Page? WordPress has totally change the blogging world and most especially the internet sphere. Gone are those days where proficient knowledge on HTML,Java coding are needed, but its no longer the case as of today. Nwbies can easily create magical designs from the comfort of their homes, just with simple basic computer knowledge. If you intend to Upgrade WordPress via SSH. I advice you learn few basic tricks.
READ THIS:How to Create a Custom Menu in WordPress 
First thing you need to do is login to your WordPress dashboard and go to Settings » Reading. Next change the “Blog pages show at most” number from 10 to anything else that you like.
Save Changes and that’s all.
Now your WordPress blog pages will display the amount of posts that you want to display.
It is highly recommended that you do not choose your number of post higher than 10 mostly when you’re not showing excerpts. Practically because the more posts you display on a page, the bigger the page size which means the slower your page will load.
