Hi Tibi,
Hope that the chapter 9 would help:
* Building themes in Plugins SDK
o Creating a customized theme
+ Setting up the theme project
+ Building differences of themes
o What's happening after deploying themes?
+ Putting HTML to use
+ Experiencing CSS and images
+ Using jQuery JavaScript library
+ Employ theme settings
+ Adding color schemes
+ Adhering to WAP standard
+ Adding runtime portlets to a theme
o Using theme, CSS, and JavaScript
+ Making use of themes
+ Applying CSS
+ Employing JavaScript
+ Experiencing the developing and debugging tools
* Customizing Velocity templates in themes
o Using default Velocity templates
+ Experiencing default Velocity variables
+ Customizing Velocity variables
o Adding customized Velocity templates
+ Using Velocity templates in drop-down menu
+ Using Velocity templates in journal article-based navigation
o Setting up customized themes and layout templates as default
Thanks
-- Jonas Yuan
Books:
Liferay Portal 5.2 Systems Development
Liferay Portal 5.0 Enterprise Intranets