Change the Appearance of  URLs

    

Tools - Global Options - URL Hotlinks
Gravity highlights URLs and colors them blue by default. You can change the highlight color or underline URLs  with these settings.
·      The color settings also affect e-mail addresses and Message-ID display in the article pane.
You can also turn off URL highlighting for individual protocols, such as FTP, Gopher and Telnet by clicking the advanced button.
You can also change the regular expression (PCRE) used for URL recognition, if you need to tweak the URL settings.
Also see: