Reply To: how to change the category font size and disable the capitalized fonts !

Hello,

Please add this code to the Theme Settings > Custom CSS > Global:

body .category-grid-item .category-title {
    color: #333;
    text-transform: none;
    font-weight: 600;
    font-size: 20px;
    line-height: 1.5;
}

Please change the styles as per your needs or take this selector
body .category-grid-item .category-title and use it in the Advanced typography as the custom selector.

Best Regards