Detach Segment on
Drag
You can detach a segment (line, arc, ellipse, or spline) from the other
entities it is attached to in a sketch, if dimensions or relations do
not prevent dragging. Detach Segment
on Drag is not available in 3D sketches.
To detach a sketch segment:
In an open part, click Tools, Sketch Settings,
Detach Segment on Drag.
Select the entity that you want to detach from
another sketch entity and drag it to a new location.
Detach Segment On Drag does not delete relations.
Delete relations before you drag an entity to detach. See Sketch
Relations PropertyManager.