What does Petit Triangle Bas 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 Petit Triangle Bas?

Messenger first drew Petit Triangle Bas in 1.0, released 1 juin 2016.

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

Messenger

Meta Platforms, Inc. has drawn Petit Triangle Bas once. Every revision Messenger has shipped is below, newest first.

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