customize slider too small/unresponsive with OceanWP

I am trying to customize the appearance of my OceanWP website, but the slider needed to get to the lower items in the customize left menu is VERY narrow and is difficult to get to respond to the mouse. I am using chrome and 1920×1080 screen resolution, but it is very frustrating. Is there a setting to make this slider in the WordPress customizer wider? I switch to using IE browser and the slider is slightly wider in that, but things take longer to load when viewing changes. I would like to us chrome but need to change something with the slider to make it more functional. This is not related to my website, this is the slider in the WordPress customizer.
Thanks