1)Select Output > Master Page > New Master Page.
2)Enter a name for the new master page in the General tab.
note: Master pages have the file name extension .htt.
3)Click the Appearance tab.
4)Select a style sheet to apply to the master page.
5)(Optional) Select the Background Sound options.
A new master page shows the body placeholder by default. You can insert topic TOCs by clicking the Topic TOC icon and breadcrumb placeholders by clicking the Breadcrumbs icon from the toolbar in the Design editor of master pages. But this toolbar does not appear for normal pages. You can insert any number of topic TOCs or breadcrumbs at any location in the master page.