Joomla 2.5 has reached its end of life as for 12/31/2014. Please be advised this may be a security risk to your website. You can view more information about the end of life here.
The most basic text formatting options users are aware of include:
How to bold, italicize, and underline text in Joomla 2.5
Joomla 2.5 makes it very easy to edit articles and set text as bold, italic, or underlined. We’ll take you through the necessary steps in this Joomla tutorial.
To apply basic text formatting in the Joomla 2.5 article editor: