Reply To: Slide show curve

Binaya D

Hi Chaminda,

Please use the following steps to fix your issue;
Go to Dashboard => Appearance => Customize => Header Image => And Select the Hide Showcase Curve => Then save it.

Please use the following css to make the image same as feature image;

#content-wrapper img {
    border: 1px solid #d2d2d2;
    padding: 6px;

NOTE: Please use the child theme style.css or custom css plugin to write the css.

We hope this will be helpful to you, if not then please let us know.