All page layouts are stored in the Master Page Gallery for the top-level site of a site collection. This library has versioning enabled, and, therefore, you can restore previous versions of page layouts, if you decide that your current modifications do not now meet your business needs or want to start modifying your page layout from a previous basis.
In this exercise, you will restore an earlier version of a page layout.
OPEN the PageLayouts child site that you used in the previous exercise.
In the Folder List task pane, expand Pages, and then double-click HRMgrEMEA.aspx.
A Microsoft Office SharePoint Designer dialog box opens, stating that you cannot edit the page in SharePoint Designer, and would ...