What does 倒退按钮 look like on emojidex?

On emojidex it is the design shipped in 1.0.34, shown above at full size. Older revisions are listed beneath it.

When did emojidex add 倒退按钮?

emojidex first drew 倒退按钮 in 1.0.14, released 2016年5月15日.

emojidex has shipped 6 versions of 倒退按钮. Each is dated, so you can see when the design changed.

emojidex

emojidex has drawn 倒退按钮 6 times. Every revision emojidex has shipped is below, newest first.

What does 倒退按钮 look like on emojidex?: On emojidex it is the design shipped in 1.0.34, shown above at full size. Older revisions are listed beneath it.
When did emojidex add 倒退按钮?: emojidex first drew 倒退按钮 in 1.0.14, released 2016年5月15日.
How many times has emojidex redrawn 倒退按钮?: emojidex has shipped 6 versions of 倒退按钮. Each is dated, so you can see when the design changed.

emojidex artwork for this emoji spans 2016 to 2017.