Hello,

I saw the screenshot you attached.

To adjust the size and the height of the page title.

You can try adding the following Custom CSS in the Global Custom CSS area under Theme Settings >> Custom CSS.

div.title-size-default .entry-title,
div.title-size-default h1 {
font-size: 18px;
height: 60px;
}

You can adjust the font size and height according to your needs.

Best Regards.