Loading a Book
Use the File->Open Book... menu item to specify the main file for the PMLR volume you want to process (Figure 20). Alternatively, you can use the File->Recent Book menu to select a recently loaded file. Note that the main file is the file that loads the jmlrbook class using:
\documentclass[pmlr]{jmlrbook}If you don't yet have a main file, you can create one with the new book function (see Creating a New Book).
Once a book has been loaded LaTeX (and possibly BibTeX) will automatically be run to create an up-to-date version of the book.
To clear the book details so that you can open a new one, use the File->Clear menu item.