Pages (Admin) Advanced Options settings

I have a very minor issue within the admin plugin.
The advanced options bar now opens by default every time i select 'Pages and takes up a large part of the screen.
Until recently it showed as single line now the dropdown options show by default
advancedbar

Can’t find any setting in the plugin that would affect this.
Anybody know how I reset it to original configuration.?
Thanks in Advance
Jerry