Print view — the full book, exactly as it will print.Use your browser's Print command (Ctrl+P or ⌘P) and choose “Save as PDF”. The page size is already set to your trim size.
FIXED PAGE SIZEPage is locked to your trim size — it never grows or shrinks when the word list changes.
This preview is the live PDF — exactly what prints, at exactly your trim size. If a word list is long, it is compacted to fit inside the fixed page (smaller list type and a wider two-column list) — the page itself never changes size.