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Trim or extend a polyline feature

Change Length Trim to Length trims or extends the length of a polyline feature. A value greater than its current length extends the line. A value less than its current length trims the line. The tool is available on the context menu when you edit vertices or resume sketching a polyline feature.

The direction of the edit is determined by a positive or a negative value. A positive value preserves the first vertex and a negative value preserves the last vertex.

When you edit a z-enabled polyline, the new vertex is assigned an interpolated z-value and the angular pitch of the line is preserved.

For steps to use this tool as you create a feature, see Trim or extend an unfinished line.

  1. On the Edit tab in the Features group, click Modify Modify Features.

    The Modify Features pane appears.

  2. Expand Reshape and click Vertices Edit Vertices.

    The tool opens in the pane.

  3. In the pane, click Active Select Active Select and select a polyline feature.

    The selection appears as a list in the pane, and the vertices toolbar appears at the bottom of the map.

    Vertices toolbar
  4. If you select more than one feature, click an item in the list to flash it in the map, right-click the feature you want to edit, and click Only Select This Unselect on the context menu.
  5. To reverse the direction of the polyline and switch the end to be trimmed, right-click and click Reverse Direction Reverse Direction.
  6. Right-click the segment.

    The context menu appears.

    Change Length
  7. Click Change Length Trim to Length.

    The dialog box appears.

  8. Click the unit format drop-down arrow and set the unit format.
  9. Type the new length in the text box and press Enter.
    • To trim the line, type a length less than its current length.
    • To extend the line, type a length greater than its current length.

    A positive value preserves the first vertex. A negative value preserves the last vertex.

  10. On the vertices toolbar, click Finish Finish or press the F2 key.

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