To use the CMSPageManager control, simply drag and drop it from the toolbox onto an ASPX page template that contains CMSEditableImage or CMSEditableRegion controls. A common place to have the control is on the master page, as this allows it to manage editable regions on all page templates that use this master page.
Page url: http://devnet.kentico.com/docs/5_5r2/controls/index.html?cmspagemanager_getting_started.htm