Modifying Shape Edges
You can also select the line between two points and move the edge of the shape without
affecting the rest of the shape.
To move a shape edge
1
With the Edit Points tool active, click any edge of a shape object.
The control points on either side of the line are selected.
2
Drag the line segment.
The distance between the two points remains constant, but the line can be moved freely.
Press Shift to constrain the movement horizontally, vertically, or diagonally.
3
To release the selection, click anywhere outside the selection, or choose a different tool
in the toolbar.