Thank you so much!
How can I hide this “Posted on January 15, 2013 by ADS” from posts. This is very helpful for me.
From your answers, my understanding are 1) Main sidebar will shows on all pages including home page. Page sidebar and home page sidebar will overwrite Main sidebar. 2) Featured Image is for posts only, not for a page like “Sample page”.
Thank you again. Now, I can use a Sample page as home page.