OCS 2.3.6 Conference Schedule date display

Hello, I have a 2.3.6 version of OCS; When I click on CONEFERENCE SCHEDULE to display my schedule
I got the lines Conference Locations, Conference Schedule and all the lines with the date that have a font
smaller then the lines with time blocks. Is there a way to change this ? I would like also add a line under
the date lines (like a HR tag in html) to get a more readable page.

Thanks for your help.