1. Click once on the magenta line to activate it.
  2. Click once in the center of the line to add a control point.
  3. Drag the top control point so it bends to the left as shown. You will also need to edit the curve at the middle point. To do this, select the middle point, and then drag the bar to adjust the direction of the curve.
  4. Click anywhere not on a curve to finish editing.

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