How to set a page layout to a different master page?

Question

If there are two master pages on a site. How can I set a second set of page layouts to draw from the second master page rather than the default master page for the site?

I've seen the MasterPageFile="" suggestion, however, I received a file not found, although the path/file exists (~/_catalogs/masterpage/MyMaster.master).

Secondly, is it possible to do this purely through SharePoint Designer?

Answer 1

The master page resides in the gallery at the site collection level.

So, you should modify the MasterPageFile attribute as below:

<%@ Page language="C#" MasterPageFile="/_catalogs/masterpage/custom2.master"

or using the ~ operator as below:

<%@ Page language="C#" MasterPageFile="~sitecollection/_catalogs/masterpage/custom2.master"