how to show different title when creating new page?

Could use an SEO plugin like Headspace 2 to help with that.

I already have headspace2 on my list but I do not see it it can do as what you said.
any spicific information?
thanks

You can set the specific title for each page or post in the Headspace module in Edit post/page. So for that page you can, for the Headspace Page Title, use something different than the actual page title.

Thanks for your comments but that is not what I want to do.
actualy I am not talking about <title> tag.
what I am trying to say is when creating a new page from dashboard ,
let say “mypage”,then the name ” mypage ” also appear in the top of the page just befor the cantent and also in the nav bar.
so I want it to be a different name for the one which is appear just before the content .
hope you underestand what I am saying with my poor English.
Regards

Before the_content(), is usually the_title(). So guess you could use a Custom Field to replace the_title().

Also see:
Stepping Into Template Tags
Stepping Into Templates
Template Hierarchy

O.K . thanks ,I think I am getting to that.
Thank you