As nice scroll is a jquery plugin for WordPress site. This plugin will create a nice scrollbar for your site. After installing and Activating the plugin, go to WordPress Admin Dahsbord and then go to Appearance > As option Here you can customize default settings. So customize settings as you choice and see a nice scrollbar at you site front-end. you can see hear : https://github.com/anuislam/As-nice-scroll you can see live
