Blog Link: http://www.seo-service-provider.org/blog/google-adwords/decrease-to-estimated-top-of-page-bid-first-page-bid/

We want to decrease 1000 keywords max. CPC bids to estimated top of page or estimated first page bid with a single click. But as for now, there is no option in adwords to do so!

That's the reason we have made this video tutorial and submitted to Google Adwords implementation team.

Hope, in the future they will include these functions!