What does Botão De Voltar 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 Botão De Voltar?

Messenger first drew Botão De Voltar in 1.0, released 1 de junho de 2016.

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

Messenger

Meta Platforms, Inc. has drawn Botão De Voltar once. Every revision Messenger has shipped is below, newest first.

What does Botão De Voltar 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 Botão De Voltar?: Messenger first drew Botão De Voltar in 1.0, released 1 de junho de 2016.
How many times has Messenger redrawn Botão De Voltar?: Meta Platforms, Inc. has shipped 1 version of Botão De Voltar. Each is dated, so you can see when the design changed.