Which versions of elements has thinify?

[Ronald Northrup]

          Which versions of elements has thinify?              

[MichelBParis]

https://forums.adobe.com/people/Ronald+Northrup  wrote

          Which versions of elements has thinify?              

What do you mean by 'thinify'?

Edit:

In PSE15 there is a guide effect in the 'Perfect Portrait' section with the possibiliy to 'slim down' your subject'.

See on the bottom right panel: