Set Browser window size & Editing Body Text

I would like to set the window size of the browser.
I was trying to enter the appropriate code, but did not manage to do it. I did not even figure out where and how to enter the code.
Any help out there? Where can I enter head text and body text? Thank you!

We don’t have any build in way to set the window size, so you would need to do this in JavaScript. (I don’t recommend this – it is a jarring thing to do)

You can edit the contents of the <head>…</head> of your exported .html file by clicking on ‘Edit HTML Head’ in the Document Inspector. If you want to edit the area in-between the ‘body’, you’ll need to do that to the document after exporting your .html file.