The technique of presenting only essential options up front and revealing advanced ones in steps, as the user signals they need them.
The export dialog uses progressive disclosure: format and destination up front, codec settings behind ‘Advanced.’
Progressive disclosure is how complex tools stay approachable without lying about their depth. It fails in both directions: bury daily-use controls and you’ve added a click to everyone’s day; disclose nothing and the first screen is a cockpit. The craft is knowing which fifth of the options serves four-fifths of the sessions.