Formatting Page Numbers within a project

How do I use two different page number formats in the same project? I need to use roman numerals for the front matter and start with page number 1 in the main body of the book.

Placeholder tags are documented in the Help/Placeholder Tags List… menu command. You can also read about page headers and footers and the usage of tags within them, in §24.22, Page Settings. Table 24.5 contains useful codes (note there is a typo on the <$p-r> code; it should look like that, not have a backslash in front of it).