Drupal 6.x: Where To Edit Title Text Size/Style In Posting Pages

In my case, I use FreeBSD Server... so here the way to go

1. Log into freeBSD server/ web server.(use root password)
   
   
2. Go to :
   # cd /usr/local/www/apache22/data/sites/all/
   themes/theme_name
   # ee style.css
   
   
3. Search h2 in the style.css file
   
   • Click ctrl +y
     Search for: h2
   • Edit font size or other style
   • Press esc + enter 2X - Save setting
     
     
4. Refresh page in browser & see the changes.