2D Layout for 3D Design

New Functionality

2D Background Generation
You can now generate a drawing view which displays the 2D layout geometry and annotations seen in the background of a 2D Layout for 3D Design view. 
Offsetting 3D Elements Associatively
You can now create an offset use-edge that will be associative to a 3D element (surface or edge).
About Multi-Domain Use-Edges
You can now create use-edges (silhouette, intersections, and projections) with multiple domains in geometrical result.

Enhanced Functionality

About View Callouts
You can now:
- Create callouts automatically in the active view, whenever possible.
- Create a callout with a size computed from the selected 3D reference, if any.
- Position callout's text manually.
- Move callout's extremities interactively so as to resize it. 
Annotation Manipulators
You can now customize the display of manipulators for annotations, whether it is for annotation selection or text edition.
Creating a Welding Symbol
You can now specify a scarf, a stud, an edge and a melt thru weld symbol in AWS A2.4 standard and an edge, a surface joint and an inclined joint weld symbol in ISO 2553 or JIS Z3021 standard. 
Engineering Symbols
As per new revision of the ISO standard related to Geometrical Product Specification - Dimensional Tolerancing (14405-1), you can now have some new engineering symbols, to provide a standardized display and print.
You can also have some new application zone symbols All Around, All About  and All Over to support ISO 10135. 

Customizing Settings

Tools > Options > Mechanical Design > 2D Layout for 3D Design > Manipulators tab > Annotation Manipulators
The new Annotation Manipulators options allow you to customize the display of manipulators, whether it is for annotation selection or text edition.
Tools > Options > Mechanical Design > 2D Layout for 3D Design > View Creation tab > Callout area
The Create callouts in active view at the end of "New View From" command option allows you to create a callout in the active view at the end of New View From command.