[Theme Horse Support Team]

Hi Alicia,

To larger the site title and bolden the headings in the right sidebar Go to Appearance -> Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save all changes button:

#site-title {
    font-size: 42px;
}
.widget-title {
    font-weight: bold;
}

Note: Increase above font size value 42 to your own size to make it bigger.

Thank you!