Yes, for single post page. If issue will appear then contact us again.

Regards,
Robert Hall.

Hello,

You’re welcome!

Regards,
Robert Hall.

Hello,

Please use this code in Global Custom CSS.

.single-post article.blog-post h6.active {
display:none;
}

Regards,
Robert Hall.

Hello,

You can use this code to change font size for all text on site.

p{
font-size:12px;
}

Regards,
Robert Hall.

Hello,

I’ve added this code in Custom CSS for tablet, Custom CSS for mobile landscape and Custom CSS for mobile. (8Theme Optioms->Styling->Custom CSS). Please check it.

.woocommerce-checkout .checkout .col-md-5{
    position: initial;
}

Regards,
Robert Hall.

Hello,

1) In this case you need create the Child Theme (read more: https://www.8theme.com/demo/docs/royal/index.html#!/2_child_theme) and upload the new icon into child-theme/images folder as made this customer – https://www.8theme.com/topic/child-theme-images-not-working/

2) Sorry, but we don’t have such feature in our theme. It’s made only for 8theme.com.

Regards,
Robert Hall.

Hello,

Sorry, but it’s very difficult to provide support without access.

Please read more here how to use Child Theme:
https://codex.wordpress.org/Child_Themes

Could you please clarify what exactly element you want to change font size?

Regards,
Robert Hall.

Hello,

Please provide us with screenshots for our better understanding what problem you have.
Also provide us with link to the page and wp-admin access in Private Content.

Regards,
Robert Hall.

Hello,

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

Regards,
Robert Hall.

Hello,

You’re welcome!

Regards,
Robert Hall.

Hello,

Please use this code in Global Custom CSS (Theme Options->Custom CSS).

.cart-bag .ico-sum{
background-color: red;
}

Please clarify your second question.
Maybe provide screenshot for our better understanding and highlight what exactly you mean.

Regards,
Robert Hall.

Hello,

1) Navigate to Theme Options->Header and select Logo image for Fixed header.
2) Also use this code in Global Custom CSS.

.fixed-header .menu > li > a{
padding: 20px 7px 15px 7px;
}

Regards,
Robert Hall.

Hello,

Please try this code in custom.css

.header-type-variant5 #main-nav {
    margin-left: 24px;
}

Regards,
Robert Hall.

Hello,

Please update Revolution Slider plugin to the latest version then check issue.

You can download the latest plugins versions at this link https://www.8theme.com/download-plugins/ ,
enter your purchase code of the theme to get the plugins.

Regards,
Robert Hall.

Hello,

Please try use this code in Global Custom CSS.

.page-id-16841 .page-heading .title{
color:red;
}

Regards,
Robert Hall.