When I want to edit page in Browser I can't see "Page Layout" Button in top ribbon of SharePoint 2010! I searched for three hours about this problem but I didn't found any solution. Please tell me how to resolve this or check some settings. (I activate Publishing in features and SP designer show to me Page Layout link in left navigation).
You have to create a publishing page to manipulate a page layout. This page is not a publishing page, it is a wiki page.
Go to site actions-->More options-->Publishing Page. You will be able to see the option then.
And then,when you try to edit the publishing page,you will see the pagelayout button right there.