Add custom background image support to wordpress
From wordpress 3.0, added new function to control the background image. For your theme if you want to add custom background image support to wordpress theme
Many people some another content or code need to add in specific pages. WordPress tutorial for, How to use is_page conditional in wordpress.
In that senorio use should use the is_page condition in page.php file. This file you will find in active wordpress theme folder.
You can use is_page condition in multiple way. Following are the some examples
// When any single Page is being displayed.
// When Page 42 (ID) is being displayed.
// When the Page with a post_title of “Contact” is being displayed.
// When the Page with a post_name (slug) of “about-me” is being displayed.
// Returns true when the Pages displayed is either post ID 42, or post_name “about-me”, or post_title
Note: You can use above condition in only page.php file.