What is the purpose of the Page width and height in the Character Image object? How is it different to object width and height other than clipping what is drawn if the page height is smaller than the object height? Is there a reason for it?

I was wondering if I have some long text spanning multiple lines and I set the page height to show only three lines, could I page up/down through the text? Setting the Y offset to a negative value seems to allow me to do that.

Still confused as to what the page width/height are meant to be used for, could you explain its purpose?