If you need to change a piece of theme or plugin defined text on your site, a simple plugin to use is Say what? plugin. The plugin doesn’t require any changing of code and is super simple to setup.
To get started changing text, first download and install the plugin from here:
Ascend transforms this particular text to uppercase, so the exact string you need is “Previous Post” and “Next Post.”
2. For the plugin to work, next determine the text domain. If you’re unsure of the theme’s text domain, you can find it in Appearance> Editor. Start by selecting your theme, and find the text domain in the theme’s style.css declaration:
Click Add New to open a new string configurator:
Your correctly configured text change should look something like this:
4. Save the text, and view the blog post to confirm change: