The feature can be seen boxed in red in the above image.
The ability to Download Outfit Images was initially introduced to YoWorld on July 15, 2016. The feature allowed players to download large high definition (HD) images of their avatars directly from the game. The image saved would be presented to look just as the player's avatar looked in-game when the image was initially downloaded. The feature was positively received by the community, and became widely used on places like the YoWorld Forums.
The feature is fairly easy to use. The button can be found while one is changing their avatar's appearance. Below the "clear items" button, the button can be seen. Reference the image in this article for the exact location of the image.