Publish is missing in the ribbon section after master page a

I have created a publishing site in SharePoint 2013. And I have created layout and based on that layout I have created pages and I published then I have created copy of default 'olo.master' page in SP Designer and changed the name and did changes according to my application and applied it for my layout after that the publish in the ribbon is not available I don't know why.kindly help me to resolve this.Below the screenshot about my issue.