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Use composer controls when a step should accept only buttons, or when you want free text again later in the same flow.

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Toggle the composer in a flow

1

Open the flow

Edit the Messenger flow where you need the change.
2

Add a Messenger action

Add Action → Messenger → Enable Message Composer or Disable Message Composer.
3

Publish and test

Publish the flow and confirm keyboard input behaves as expected on mobile Messenger.
Disable the composer on menu-heavy steps, then re-enable it before open-ended questions or AI Agent handoff.