customize category page in magento

I am a newbie in mage开发者_StackOverflow社区nto. Please let me know how can I edit my category page. If I want to add some html code to a particular category then from which file should I for in magento root folder.

Please help. Thanx in advance.

If you only want to add to the category and not modify the existing output, then one option is to create a Static Block with whatever html that you want, and then edit your category and choose that block in the "Display Settings" tab.

Since you're new perhaps you should start with the designer's guide and theming wiki.

The difficulty with theming is no one file is responsible, about the best trick you can learn is using template hints.