Verticalis Slider WordPress plugin is having two different sections : Navigation Section and Content Section. Navigation section, which is present in left hand side of the Verticalis slider, contains couple of words per arrow box. You can change the CSS of that navigation area even from the settings panel of the slider plugin. Here is the screenshot taken from settings panel where you can see “CSS for Navigation”. Once you will activate the plugin, the “CSS for Navigation” box will populate with the default CSS elements. There you can change the values and save settings to get the new style for the slider navigation.