To install just follow the installation steps of most WordPress plugin’s:
e.g.
- Download the file lb-back-to-top.zip;
- Unzip the file on your computer;
- Upload folder lb-back-to-top, you just unzip to
/wp-content/plugins/
directory;
- Activate the plugin through the ‘Plugins’ menu in WordPress;
- Be happy.
Important: This plugin uses the wp_footer action, then it is necessary that it be called in your theme.