Remove grey solid box behind the arrow in the slider

Hi, how do I remove grey solid box behind the arrow in the slider? I just want to have the arrow. Is this possible? Thanks

 

Hello,

Go to images directory present in your theme directory and replace your images with present slider arrow images or edit it.

The name of image is "btn-prev-slider.png" and "btn-next-slider.png"

Note:- Use same name for your edited image and remove the current image.