Hi Michael,

The UV packing is on the UV tab, or in the Up Menu : Texture / UV Operators / Pack ...

The tool could be more powerfull, especially when dealing with uvs coming from MoI.
The automatic stretch option dont work that well, many uv island could be stretch much more on one uv axis to keep the ratio square.





On more complex objects (with lot of trims), there are often overlaping uvs after the packing.

Ill take some time to report the problem on the beta forum, maybe the tool will receive some love in the futur.