Ok...where is Dynamic Media Image Preset Editor in AEM Assets...is it in the tools menu?...not seeing it in the below  

Not the question really...I want to crop to the image subject, i.e. a chair that has a white background...so that the crop results in the edges of the image touching the edges of the chair...like this one below: Eric 

We have product images on white backgrounds, we want to remove the white background by cropping to the image subject without cropping off any of the image subject, this currently happens with Smart Crop. We are using Dynamic Media with AEM Assets.