Hello,

Try to add following code into custom.css file.
@media only screen and (max-width: 479px){
.rows-count4 .product-grid .product-image img {
width: initial !important;
}
}

Regards,
Robert Hall.

You asked about header. Breadcrumbs is section below. Could you please clarify on what page you want do changes?
For example, for portfolio page you need edit \themes\royal\portfolio.php file.

Regards,
Robert Hall.

In this case you can edit header-structure-1.php file.

Regards,
Robert Hall.

Hello,

Please add following code into custom.css file.

.page-heading{
background: (here link to your image);
}

Regards,
Robert Hall.

Hello,

Sorry, but we can’t see your admin panel because getting white page.
Do you made some changes?

Regards,
Robert Hall.

Hello,

You’re welcome!
If you have any questions don’t hesitate to contact us.

Regards,
Robert Hall.

Hello,

I’ve selected Contact Page in Page Attributes and now it’s look like good. Check it please.

Regards,
Robert Hall.

Hello,

For example, you can try to find plugin on this site:
https://wordpress.org

Regards,
Robert Hall.

Hello,

Please add this code into custom.css file.

.et-mobile-menu li a{
color:#fff !important;
}

Here is a video tutorial how to create custom.css: https://www.youtube.com/watch?v=Qok2zRedRMY&feature=youtu.be.

Regards,
Robert Hall.

Hello,

You’re welcome!

Regards,
Robert Hall.

Hello,

You’re welcome!
We will be very grateful if you could leave a rating for our theme and your review.
http://themeforest.net/item/royal-multipurpose-wordpress-theme/8611976

Regards,
Robert Hall.

Hello,

As I see you use old version of the theme. Please update it to the latest.
Don’t forget to make backup your site before.
Here is video tutorial how to update theme:
https://www.youtube.com/watch?v=KdWESIIPU1k

Regards,
Robert Hall.

Hello,

To enable mobile menu navigate to Appearance->Menus->select menu and check mobile menu. Please look at screenshot: http://prntscr.com/5h7yye

Regards,
Robert Hall.

Here is a video tutorial how to create custom.css: https://www.youtube.com/watch?v=Qok2zRedRMY&feature=youtu.be.
The video tutorial is for Legenda theme, but the process is identical.

Regards,
Robert Hall.

Hello,

Please provide us with wp-admin access in Private Content.

Regards,
Robert Hall.