Use the Draw | Tools | Reshape or
Boundary | Edit Boundaries | Reshape
command 
to move, add, and delete vertices within
a selected polyline or polygon. This command is available only when a
single polyline or polygon is selected. For doing detailed work, or when
there is an abundance of vertices in the area you want to reshape, it
is helpful to zoom in your view of the area you are working on before
using this feature.
After selecting Reshape, all vertices in the selected object are shown with hollow squares. You can click a vertex to select it. The selected vertex is indicated by a solid green square and it can be moved by dragging it with the mouse.
When Reshape is selected, the object color changes to red, vertices that make up the object are shown by small hollow squares. A selected vertex is shown as a solid green square.
Reshaping Boundaries
To edit the shape of a curve or area:
1. Select the object.
2. Click Draw | Tools | Reshape (or Boundary | Edit Boundaries | Reshape)
3. The object line color changes to red and vertices appear as small hollow squares.
4. To move a vertex, click on the vertex with the mouse and drag it to a new location. To add a vertex, hold down the CTRL key and click the area on the area or curve. To delete a vertex, select it and then press the DELETE key.
5. After reshaping the object, press the ENTER key to end reshaping or press the ESC key to cancel the changes.
Reshape Keys
There are a number of special keys that control the Reshape operation.
ALT - To snap the selected vertex to the closest point of another curve or area, press the ALT key while dragging the vertex.
CTRL - To insert a vertex, press the CTRL key. The 
cursor is displayed when
the CTRL key is being held down. Hold down the CTRL key and then click
the left mouse button at the location where the point is to be inserted.
The cursor changes back to the 
cursor after the point is inserted. If the vertices on either side
of the inserted vertex are shared with other objects, the inserted
vertex is also shared.
CTRL+SHIFT - To keep the vertex from being shared, hold down the SHIFT key in addition to the CTRL key before inserting.
DEL - To delete a selected vertex, press the DEL key.
DEL+SHIFT - If the vertex is shared, hold down the SHIFT key before deleting so the vertex is only deleted from the selected object.
SHIFT - When you are moving a shared vertex, you can hold down the SHIFT key before dragging the vertex. This moves the vertex in the selected object only.
See Also