how to resize project window

Q:I'd like to resize project window using drag and drop After creating a
project file.
Is it possible ?
A:Possible yes. Easy no.
If you want just stretch the stage it's much easier than expanding it to fit
more items in it.
Eitherway, you'll have to create a custom border and by clicking and
dragging those borders you'll have to chage the stage rect and drawRect
properties.