The Polyline command draws a series of joined line or arc segment.


A polyline consists of line segments that are joined end to end.
Use the Line command to create single-segment lines.
Use the Lines command to create multiple touching line segments as separate objects.

To draw a polyline

1. Pick the start of the first segment.
2. Pick the end of the first segment.

This is also the start of the next segment.

3. Pick the end of the next segment.
4. Continue picking until the polyline is complete, and press Enter.

Polyline options


The Close option closes the curve.

Note: This option appears only after three points have been placed.


The Helpers option turns on dynamic tracking tangent and ortho lines that make it easier to extend arcs with lines and draw arcs aligned x- and y-axes.


The Length option sets the length for the next line segment.

Note: This option is only available when the Mode option is set to Line.


The Mode option controls whether line segments or arcs are drawn.

Mode options


The Line option sets the drawing mode to line segments.


The Arc option sets the drawing mode to arc segments.

Arc options


To use the Direction option, pick a point to show the direction of a line tangent to the arc's first end point.


To use the Center option, pick a center point for the arc's radius.


The PersistentClose option closes the curve as soon as there are two points placed.

Note: If you continue to pick points, the curve updates the shape while remaining closed.


The Undo option reverses the last action.


The PolylineOnMesh command draws a multi-segment polyline on a polygon mesh object.

To draw a polyline on a mesh object

1. Select a mesh.
2. Pick the start the polyline.
3. Pick the next segment, and press Enter.

See also

Draw lines and curves

Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015