Hello,
In this case you need increase the width of your image adding this code in custom.css file:
.wpb_single_image img {
width: 418px !important;
}
and remove margin value:
.wpb_single_image {
margin-bottom: 0px !important;
}
How to create custom.css you can watch in this tutorial (it’s for Legenda theme but the process is the same).
Regards,
Eva Kemp.