progressive-disclosure

Reveal Complexity Progressively

Nielsen defined progressive disclosure in 2006: defer advanced or rarely used features to a secondary screen, making applications easier to learn and less error-prone. This improves learnability, efficiency of use, and error rate.

The Two-Level Limit

Never go beyond two levels of disclosure. Usability drops rapidly at three or more levels because users get lost navigating between them. If a settings panel requires three levels of nesting, the design needs simplification, not more progressive disclosure.

Linear's philosophy: "Simple first, then powerful." Intercom's principle: "Simple and opinionated by default, progressively reveal power and flexibility."

Onboarding

Onboarding is progressive disclosure applied to time. The data is stark: 40–60% of signup users never return after their first experience. Every extra minute in time-to-value lowers conversion by approximately 3%.

Signup

• Limit to 3 fields maximum — every extra field costs roughly 7% conversion
• Frame additional questions as personalization, not interrogation
• Example: Notion asks "What will you use this for?" to customize the experience

Product Tours

• 3–5 steps maximum
• Always include a skip button
• Focus on one critical action rather than explaining every feature
• Users are 4.5x more likely to complete a second tour if they complete the first one — make the first tour excellent and brief

Checklists

Checklists work because of the Zeigarnik effect — the psychological need to complete unfinished tasks.

Rules:

• Start the progress bar at 20%, not 0%
• Keep checklists to 3–5 items
• Nest them directly in the product, not floating on top
• Tie items to real user actions that demonstrate value, not arbitrary feature exploration

Empty States

Empty states are the most underrated onboarding surface. Notion fills its empty first-use state with educational content that doubles as a checklist.

Every empty state needs three things:

1. Context explaining why it is empty
2. A single clear call-to-action
3. Reassurance that nothing is broken

Never show a blank screen with "No data yet." An empty state should never feel empty or negative, even when things aren't working as expected (SAP Fiori).

Review Checklist

When reviewing or building progressive disclosure:

• Advanced features deferred to secondary screens
• No more than two levels of disclosure anywhere
• Signup limited to 3 fields maximum
• Product tour is 3–5 steps with a skip button
• Checklists have 3–5 items and start at 20% progress
• Checklist items tied to value-demonstrating actions
• Every empty state has context, a CTA, and reassurance
• No blank "No data yet" screens anywhere
• First-run experience focuses on one critical action