Some Notes in Joomla

• You activate the themes from administrator >  extensions > template manager. 
• you can add  external js file in /media/system/js folder. 
• xmap url   generator plugin generates sitemaps.it also provides sef url output 
• mod_php  module allows you to add any html/javascript/css and PHP to a Joomla      or Mambo module position. It can be used to add affiliate code, copy and      paste codes, google adsense etc. You can copy the module using Joomla's      module copy feature, to create multiple versions with different content.      This is module is based on mod_html so has all the mod_html features, plus      the ability to include php code. You can find some copy and paste code      exmaples here: http://fijiwebdesign.com/content/view/94/55/1/1/  
• there are   three ways to install a module,component and plugin. go to extensions      >> install/uninstall in the admin panel. from there you can install      the extension via uploading the packaged extension as zip file or you can      put the contents of the ziped extension in "tmp" directory of      the site and use the install from directory or you can install directly      via the url.remember however to activate the extension and set the initial      parameters from the extension>> module manager or extension>> plugin manager. 
• you can get the joomla extensions from the site: http://extensions.joomla.org/ 
• you can set the site settings including sef url,cache etc in global configurations from the admin panel. 
• you can  output the modules and components template files with your own theme styling and configuration.here is the link http://docs.joomla.org/Understanding_Output_Overrides 
• note to set the menu item of home in menu system to      index.php?option=com_content&view=frontpage article.then whatever      article you keep in frontpage layout will be enabled. 
• you can see the details of this <jdoc:include from here: http://docs.joomla.org/Jdoc_statements 
• here are links to generation of components codes. :  
• http://www.joomlafreak.be/joomla_component_code_generator/codegenerator.html 
• http://www.notwebdesign.com/joomla-component-creator/ 
• in the search module if you enable "gather search statistics" then the search terms are store in the database.you can use this for the seach keywords clouds etc. 
• you can clean cache from the joomla site using administrator go to tools >>  clean cache or tools >> purge expired cache. 
• you can read/write messages and send it to users via tools >> read messages      and tools >> write messages. you can also mass mail via tools  >> mass mail. 
• you can check which images are present in the system via the media manager.goto      site >> media manager in the admin panel.you can also edit and delete media from here if you want. 
• you can preview a site with preview link at the top right. 
• you can  change admin theme from extensions >> template manager >>  administrator tab.