> You’re creating a patient registration flow and your user is partway through the form wizard and needs more information on how to find and fill out their “insurance certificate number” in order to continue. Some users need to know what this means. Others need to know where to find it (hint: it’s on another piece of paper).

> You’ve come to a crossroads. Do you interrupt the flow? Add a page? A modal? How do you decide what to do?

This article offers a decision making framework: what component you should use and when.

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