# 2.2.7 Modify

The Modify command is used to change characteristics of or extend existing track by adding new track. This command works with any unconnected track endpoint.

The Modify command can be invoked using the Change>Modify menu item, the Modify button or the menu raised by a Right-Click over the Main Canvas.

Either the left mouse button (for changing length or creating a tangent track) or the right mouse button (for extending with a new track) is used to modify the unconnected endpoint.

The endpoints of a Line, Dimension Line, Table Edge or Bench-work can be dragged to new positions. A Box is treated as 4 Lines.

Curved Lines are modified in same manner as curved track.

Selecting a corner of a Poly Line, Filled Box or Polygon moves that corner to a new position, and if moved close to a neighboring corner will merge the two corners and delete the edge between them. Selecting an edge will create a corner that can be dragged to a new position.

Any tracks created during the Modify command will have the following properties inherited from the first track: selected state, hidden state, scale, track gauge and Layer.

For detail about;

  Changing track length refer to Section 2.2.7.1.

  Creating a tangent to a curve refer to Section 2.2.7.2

  Changing track radius refer to Section 2.2.7.3

  Extending track length refer to Section 2.2.7.4

- 2.2.7.1 Changing Track Length
- 2.2.7.2 Creating a Tangent to a Curve
- 2.2.7.3 Changing Track Radius
- 2.2.7.4 Extending Track Length