There is no setting of putting the admin function vertically but if its a nuisance you can choose to not to display it by adding this filter to your functions.php file. The admin bar will be hidden in the frontpage but will be visible in the dashboard
add_filter('show_admin_bar', '__return_false');
When you are working you can also hide it temporarily using firebug. Just select the div
#wpadminbar and apply the visibility CSS rule :
visibility:hidden;
This is not a permanent thing it just helps you to visualize the fixed menu hidden beneath your admin bar.