The Board Outline Sketch is used to define the exterior dimensions of the PCB. This layer syncs with the Board Outline Layer in 2D PCB.
In the Electronics workspace, in an open 3D PCB document, either:
If editing the sketch for the first time, select the initial plane or face to begin the sketch on.
Valid selections are:
Origin planes
Work planes
Planar faces on geometry
Draw sketch geometry to create a closed profile.
Click Finish Sketch.
Use the Project tool to reference geometry from an Assembly Context.