Question

Click on 4 places and draw curve line.

Answer 1

To edit the line:

To move or resize it, single click once till diamond handles show. Drag to move it or drag the handles to resize it. Press Ctrl key down while dragging the handles will keep aspect ratio of the curve.

To rotate it, single click twice till circle handles show around it. Drag the circle handle to rotate it. Drag the cursor in the middle of the shape to change center of rotation.

To skew it, single click 3 times till triangle handles show around the shape. Drag the triangle handle to skew it.

Double click curve to open Properties dialog to customize line, arrow head(s), dimension, or code when clicking/moving/resizing the curve, etc.

Hope it helps uh dear..!!