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Edit segments and add points

Segment editing lets you tweak shapes between any two adjacent vertices, add a new vertex, or delete one — without redrawing the shape from scratch.

Double-click to enter segment edit mode, then drag a point or click a segment to add one.

Enter segment-editing mode

Section titled “Enter segment-editing mode”
  1. Press V for the Select tool.
  2. Double-click a Linestring, Lane, or Polygon.
  3. The shape switches to point-edit mode: each vertex becomes a draggable indigo handle.

Move a point

Section titled “Move a point”

Click and drag a vertex. If the point is shared with another shape (see Point Sharing), every shape that holds it moves together.

For lanes, dragging a boundary point updates both lanes that share the boundary — see Lane connection model.

Add a point

Section titled “Add a point”

Click anywhere on a segment (the line between two existing points). A new vertex is inserted at the click position.

This is the fastest way to introduce a curve into a previously straight section: add a point, then drag it.

Remove a point

Section titled “Remove a point”

Select the vertex (it turns solid indigo) and press Delete or Backspace.

Exit segment editing

Section titled “Exit segment editing”

Press Esc, click outside the shape, or pick another tool. The shape returns to normal selection mode.

See also

Section titled “See also”