[Theme Horse Support Team]

Hello @jbedel,

To remove those section just login to your dashboard and go to Appearance -> Customize -> WP Portfolio Pro Theme Options -> Custom CSS and paste below custom CSS code.

.site-header, #secondary {
    display: none;
}
#page:before {
    background-color: transparent;
}
#content {
    float: none;
    width: 100%;
}

Thank you!