What does 快速下降按钮 look like on JoyPixels?

On JoyPixels it is the design shipped in 11.0, shown above at full size. Older revisions are listed beneath it.

When did JoyPixels add 快速下降按钮?

JoyPixels first drew 快速下降按钮 in 1.0, released 2014年9月4日.

JoyPixels, Inc. has shipped 20 versions of 快速下降按钮. Each is dated, so you can see when the design changed.

JoyPixels 2.2

JoyPixels shipped a new design for 快速下降按钮 in 2.2, released 2016年5月31日. The previous design is shown beside it.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does 快速下降按钮 look like on JoyPixels?: On JoyPixels it is the design shipped in 11.0, shown above at full size. Older revisions are listed beneath it.
When did JoyPixels add 快速下降按钮?: JoyPixels first drew 快速下降按钮 in 1.0, released 2014年9月4日.
How many times has JoyPixels redrawn 快速下降按钮?: JoyPixels, Inc. has shipped 20 versions of 快速下降按钮. Each is dated, so you can see when the design changed.