The Modify Line/Arc command enables you to modify a line or an arc interactively.
In the case of a line:
- If you click close to an endpoint you can move the endpoint to a new position, thus modifying both the length and the direction of the line. Alternatively, you can enter the new values in the Length and Angle mini-dialog boxes.

- if you click close to the midpoint you can move the midpoint to a new position on the line, thus modifying the length while keeping the direction unchanged. Alternatively, you can enter the new value in the Length mini-dialog box.

In the case of an arc:
- If you click close to an endpoint you can move the endpoint to a new position, thus modifying the extension of the arc. Alternatively, you can enter the new values in the Center angle and Start angle mini-dialog boxes.

- If you click close to the midpoint you can move the midpoint to a new position, thus modifying the radius. Alternatively, you can enter the new value in the Radius mini-dialog box.

The command also enables you to modify the extension of an axis of a hole in a drawing view.