How do I control font scaling?

Pass allowFontScaling. The prop threads through every Text and TextInput the component renders itself — the trigger label, the placeholder, item labels in the default renderer, and the built-in search input.

<Dropdown
  allowFontScaling={false}
  data={data}
  labelField="label"
  valueField="value"
  onChange={(item) => setValue(item.value)}
/>

Three sensible choices:

• Default (undefined) — React Native's default, which is true on iOS and Android. Labels scale with the user's font-size accessibility setting.
• true — same as default, but explicit.
• false — locks labels at their declared size. Use sparingly; disabling font scaling hurts users who rely on larger text.

If you use renderItem, renderInputSearch, or renderSelectedItem, you're responsible for font scaling in your own text.