Hi,

To change the fonts in Thorium, please install and activate the plugin Easy Google Fonts for advanced usage, you'll be able to change the overall fonts easily via the plugin.

- Video URL

Or if you want simply to include that font, include it on your WordPress and then change it via Custom CSS.

This is how you include a font in your WordPress, the following CSS needs to be added at Appearance > Customize > Additional CSS.

@font-face {
    font-family: 'debssite';
    src: url('fonts/debssite.eot');
    src: url('fonts/debssite.eot?#iefix') format('embedded-opentype'),
    url('fonts/debssite.woff2?') format('woff2'),
    url('fonts/debssite.woff?') format('woff'),
    url('fonts/debssite.ttf?') format('truetype'),
    url('fonts/debssite.svg?') format('svg');
    font-weight: normal;
    font-style: normal;
}

You should simply upload the .eot or .woff files in your WordPress and replace them on the font face, then down below this code, this is the selector for the menu.

header.primary-header nav ul li a {
    font-family: your_font !important;
}

Also, to remove the dot from the parent of dropdown, simply add the following style.

header.primary-header nav ul li.menu-item-has-children > a::after {
    display: none !important;
}

Kind Regards