CSS for theme Twentyseventeen

To prevent unwanted effects when using theme Twentyseventeen, the following custom CSS is recommended:

To prevent navigation, medals, new/modified icons and slides from scrolling over the menu:

.site-navigation-fixed {
    z-index:100 !important;
}

To hide unwanted white and black lines and borders that show up near photos but not near videos:

.wppa-container a,
.wppa-container img,
.wppa-widget a,
.wppa-widget img {
    box-shadow:none !important;
}

You can enther custom CSS in Table IV-A15 of the Photo Albums -> Settings admin page, or on the themes customization screen.