Q:

SharePoint 2013 - How to properly add meta data from a custom page layout

I would like to add this specific line to my SharPoint pages...
<meta name="viewport" content="user-scalable=yes, width=1024, initial-scale=1.0, maximum-scale=5.0, minimum-scale=0.25"/>

But do it from the custom page layout, not from the master template.  Is this possible?  Every time I add this line to my page layout and publish it, I do not see it on a production page.
thanks

A:

Yes you can add the meta information through your custom page layout, by doing following:
<asp:Content runat="server" ContentPlaceHolderID="PlaceHolderAdditionalPageHead">
    <!-- Add stuff here -->
</asp:Content>

where PlaceHolderAdditionalPageHead will place additional content that needs to be within the <head> tag of the page.
Reference:
Required Content Placeholders in SharePoint Masterpages

