What does Bouton Identifiant look like on Messenger?

On Messenger it is the design shipped in 1.0, shown above at full size. Older revisions are listed beneath it.

When did Messenger add Bouton Identifiant?

Messenger first drew Bouton Identifiant in 1.0, released 1 juin 2016.

Meta Platforms, Inc. has shipped 1 version of Bouton Identifiant. Each is dated, so you can see when the design changed.

Messenger

Meta Platforms, Inc. has drawn Bouton Identifiant once. Every revision Messenger has shipped is below, newest first.

What does Bouton Identifiant look like on Messenger?: On Messenger it is the design shipped in 1.0, shown above at full size. Older revisions are listed beneath it.
When did Messenger add Bouton Identifiant?: Messenger first drew Bouton Identifiant in 1.0, released 1 juin 2016.
How many times has Messenger redrawn Bouton Identifiant?: Meta Platforms, Inc. has shipped 1 version of Bouton Identifiant. Each is dated, so you can see when the design changed.