Change H1 in wordpress on a single page

Hello Friends, I want to change in wordpress H1 for only one page and first time i try to change my title in example:

<center> page site title </center>



direct in wordpress page title section and working... but my question if this is ok for SEO ?

didn't understood completely the question, but if you want to change your page with all posts and post categories, I think it's not a good idea to have that many H1 tags on a single page. Keep H1 on single post only