We have made some changes to the Menus and stylesheets of OASIS which were realeased on Tuesday 11th March - they should help if you are working on smaller screens.
It is possible that your browser might have cached the old versions of the stylesheets, if you see anything strange in the formatting of the pages try pressing
CTRL + F5 or CMD + SHIFT + R (Mac)
to reload the stylesheets and clear the issue.