progressive-disclosure-defaults-and-tucking

Classify each control by who uses it, when it is needed, and how often. Controls used by over 50% of users per visit stay primary; those under 5% move behind disclosure or to a separate page. Usage analytics is the strongest signal for these decisions.

Default open for the section users most likely need, required form sections, and the first section in a sequence. Default closed for supplementary, advanced, or rarely used sections. For returning users, persist and restore their previous toggle state.

Controls used by fewer than 5% of users per visit are strong tucking candidates, and those under 1% are candidates for removal. Controls in the 5-20% range belong behind one explicit disclosure affordance like an accordion or Advanced section.

No. Never bury error states inside collapsed accordions. If a form section contains an error, that section must be open or auto-open on submit failure so the user can see and fix the problem.

The Advanced label fails when it becomes a dumping ground for unrelated controls or feels condescending for merely unusual settings. Keep it focused on power-user tools, ensure it is findable, and consider alternatives like Optional or More options.