Hi Siva -
Unfotunately, no. There is no supported way "permanently configure" the UI to behave differently. Currently, only the data window can be resized, and that setting is not permanent.
Other people have approached this topic by launching the enviornment in its own brower window rather than embedding it into a smaller window inisde the larger portal page.
Can you please tell me know how to re size the data window.
This is a feature in the recently released 8.1, which you may not be running yet – you simply resize it with the mouse by grabbing and dragging the right-hand side of the pane.