How do I change the size of my logo on the mobile site?
Open the Themes menu, and select HTML/CSS Editor.
Click HTML in the Mobile section from the menu on the left.
Edit the size of your logo.
Click Save and Close in the top-right corner.
Enter a theme name.
Click OK.
Note: Responsive themes will not have a mobile section in the HTML/CSS editor, because any modification made on a responsive theme will be automatically optimized for mobile viewing.