Most showit templates will come with the older and newer post links already built into the blog template pages, but if they get removed and you need to add them back you can do so by following these directions!
How to add older and newer buttons to your blog template
Click add new canvas
Locate the template you're using or use any of the free templates available in Showit.
Click on the template and then click on the blog page.
Next click on the canvas titled older/newer or pagination.
The canvas will automatically add to the bottom of the page, so you'll want to click and drag the canvas to the place you'd like it to live on the page.
Lastly, if on the main blog page template be sure to set the "newer posts link" and "older posts link" placeholders on the buttons. If on the single post template page, set the "next single post link" and "previous single post link" placeholders.
Locate missing pagination on the live site
So you're seeing the older and newer post links in Showit, but they are not showing up on the live site? Have no fear! 99% of the time the pagination is not showing on the live site yet because you do not have enough posts to load another page of posts, which is when these buttons are needed.
The default number of posts set to load per page is 10. The older and newer post buttons will not load on the site until there are at least 11 blog posts published. If you would like to change the number of posts that load per page, you can set this in Wordpress under settings > reading.