Display full pdf height

I just installed the PDF Viewer plugin. I works great. One issue:
The plugin displays my form at full width when I include width=100% as a shortcode attribute, which is perfect, width-wise. However, the plugin does not display the full height of the form, but shows about 60 – 70 percent of the height with a vertical scroll bar for scrolling through the full height of the form, which does work perfectly.

Is there a way I can get the plugin to display the full height of the form, instead, without a need for vertical scrolling within the viewer?

When I add a height=100% attribute, instead of working correctly, the height of the viewer shrinks way down to display about 10% of the form. No, I didn’t accidentally type height=10%.

Thanks for any advice you are able to provide.