Can't change static background image on Efor Coaching "Linda" theme

I purchased the Efor themeforest “Linda” for coaching businesses. There is a background image of a woman and man that remains as the sliders go over it I want to change that image. Does anyone know how to do it? There is no “background” image option I can find anywhere on Elemenator or Customization. Thanks for any help!

Hi

The best way to get the support is Contact your purchased Item Author and let them know. Theme Author will assist you.

Thanks