Changing styles of view port

[pmehta18]

I want to change the style of viewport as it becomes too small when my screen height reaches upto 10000px

pagemap(document.querySelector('#map'), { viewport: null, styles: { '.node': 'rgba(0, 0, 0, 0.08)', '.link': 'rgba(63, 81, 181, 0.08)', }, back: null, view: 'rgba(0,0,0,0.05)', drag: 'rgba(0,0,0,0,0.10)', //back: 'rgba(0, 0, 0, 0.08)', interval: 50, });