How to enlarge GoJS diagram

GoJS
1

I have an GoJS editor. Using this editor I can create memos which contains text, image and freehand drawing.
The size of my editor canvas is 250px * 250px.
A screen shot of my editor is attached here.

But I want to show , the created memo in a large(450*450) pop up.

How can I enlarge the memo without changing the relative position of its contents?

2

It’s not clear exactly what you want to do. Should the pop up just be an image of the original memo, not an editable diagram? If so, you can call Diagram.makeImage and set the size, then show that image in the pop up. Read more about making images in the intro page.