Customize select dropdown list  

Hello, 

Go to your Dashboard and navigate to 

Appearance >> Customize >> Basic Customization >> Aditional CSS  section and write this code

.primary_navigation li.has-sub>a:after {
display:none;
}

Thank you for your reply, but those are not the arrows I am talking about - those are for main navigation and I do want those to display. I am referring to the arrows that come up way to the right when you add a select drop down list. Here is a screen shot: