To edit a line you first need to select it
You can then edit it in place or by entering values in its properties dialog
To edit a line, you can either:
| • | drag either end of the line by pressing the left mouse down over one of it's end points, dragging the mouse and then releasing it or |
| • | drag the line by holding down the left mouse button over central area of line and dragging it to it's new position and releasing the left mouse button. |
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