[Resolved] Header Image

Sorry, no, the theme does not have a slider.

It is possible using a slider plugin. You would need some php knowledge.
You could copy the header.php file to a child theme and change it to display the content from a slider plugin.

For example, in the header.php file there is the trusted_header_title() function which prints out the header image/title/excerpt etc, and you could make changes so that it displays a slider instead based on certain conditions.

e.g. to show slider only on home page:

if ( is_home() ) {
    echo do_shortcode( '[slider-plugin-shortcode]' );
} else {
    trusted_header_title();
}

replacing slider-plugin-shortcode with the actual shortcode for whatever plugin you use.

Yes it should be OK. It looks like putRevSlider() is Revolution Slider’s built-in function that does similar job to the WordPress do_shortcode() function.

In the code I gave earlier, I forgot about the blank canvas template condtitonal, so the code to use should be this:

Replace this code in header.php file:

if ( ! is_page_template( 'template-blank-canvas.php' ) ) {
	trusted_header_title();
}

with this code:

if ( ! is_page_template( 'template-blank-canvas.php' ) ) {
    if ( is_home() ) {
        putRevSlider( 'Featured Posts' );  
    } else {
        trusted_header_title();
    }
}

To remove the header background image on the homepage add this to Additional CSS (or in your child theme’s style.css):

.home .main-header {
    background-image: none;
}