Resizing a Rectangle in React Three Fiber

[black2012]

I have an application in React Three Fiber where I create a rectangle using 4 lines (the reason being that I want to represent these lines in different colors and dashed styles). I use a shape as the background. Now, I would like to have the ability to click on this rectangle, which should display adjustment points. This part is working so far. However, I can't find a way to easily resize the rectangle.

Do you have any ideas?

My Example:

Thank you very much in advance.