I know this is probably out of the scope of theme support, but i hope you can answer because i got no luck finding the solution…
How can i remove the thumbnail next to the arrow in Revolution Slider?
Every time i bring the mouse to click the arrow, this thumbnail appears and it covers my content without any real benefit to itself. Removing it, even site-wide, would be great.
I hope you are well today and thank you for your question.
You can disable it from Thumbs option in the Navigation tab of Revolution Slider as described on the following page.