View inserted html elements content inside a div, smaller

View inserted html elements content inside a div, smaller

Hi there. It's great that I can even ask questions like these, on a forum like this and I would like to say thank you. 

Within the html page: making a preview in a div box, of html pages elsewhere in the site.
How do I size the content of the injected html elements, to be proportionately smaller, and fit inside the box to view. This is for a financial transaction site. So typically end users want to preview statements in tables and image graphs before they generate the final pdf.

I know that as a first step you would find(*) all elements within the div. Then i don't know?  Is there a build in jquery function to say new window or viewport is this size for example let's say 300px by 200px.