If you edit a master page, all associated pages will update to incorporate the new master page design. Master pages can be edited like any other page in your publication.
To edit a master page:
On the Pages panel, double-click a master page thumbnail from the Master Pages window.
Add or edit content on your displayed master page as you would for a standard publication page.
To edit a master page's properties:
On the Pages panel, -click a master page thumbnail in the Master Pages window, then select Properties.
Master page properties include page dimensions, object scaling and margins.
To rename a master page:
On the Pages panel, click on a selected master page thumbnail name (e.g. Master A) in the Master Page window and type a new name.
To duplicate master pages:
On the Pages panel, select the master page thumbnail from the Master Pages window.
Click Duplicate. The duplicate page is added after the originally selected page.
To remove a master page:
On the Pages panel, select a master page thumbnail from the Master Pages window.