1. Enter the distance of the concentric or parallel entity from the original entity in the options tool bar shown at the top.
2. Enter the number of parallel or concentric entities to create in the options tool bar.
3. Click the base entity. The parallel or concentric entities are created on that side on which the mouse cursor is located while selecting the entity.

QCAD Pro:

Additional options for the handling of polylines are shown in the options tool bar:

Mode

• Polyline Mode: In this mode, the offset tool offsets entire polylines at once.
• Segment Mode: In this mode, individual segments of polylines can be offset.

Join Types

• Round:
  
  Edges are rounded with a radius that equals the offset distance.
  
• Miter:
  
  Edges are trimmed.