Deep Dive is an extra layer of structured, template-aware prompts available on Characters and Pilot Episode Structure — both are Pro features. Go to Settings/Deep Dives to find both switches (off by default), so you can turn one on and leave the other plain; Free accounts see the switches but turning one on prompts an upgrade.
On Sidebar/Characters, Deep Dive unlocks Unity of Opposites, Character Builder, and Cast Bible tabs on top of the simple cast roster. On Sidebar/Pilot Episode Structure, it unlocks a beat sheet tab matched to your pilot template (Prestige Drama, Half-Hour Comedy, Broadcast Hour, Limited Series, or High-Concept Genre).
Season Structure works differently: there’s no separate Deep Dive switch there anymore. The Sidebar/Season Structure/Season Arc tab always shows the Beginning/Middle/End outline, and Pro accounts automatically see a genre-specific beat-by-beat breakdown nested inside each section — no toggle needed. Free accounts see a small note under Season Arc pointing to what Pro unlocks.
Leave every Deep Dive off (or stay on Free) and the boards still work as plain Beginning/Middle/End and roster fields.