These commands allow one to change the tangent points (entry and exit) of the transition curve defined at the current vertex. There are three different options.

“A”: If a transition curve has been defined at the previous vertex, MDT will change the tangents of the previous and current vertices so that the exit and entry tangents of both vertices coincide.

“P”: If a transition curve has been defined at the next vertex, MDT will change the tangents of the next and current vertices so that the exit and entry tangents of both vertices coincide.

“<”: When this button is clicked, MDT will graphically request the distance to the tangent to be set from the current vertex. In this case, the entry and exit tangents will be equalled.

<: Establishes as the current vertex previous vertex to the one currently being edited.

>: Establishes as the current vertex the following vertex to the one currently being edited.

Apply : Updates all the changes made on the drawing.

          Once the dialogue box has been validated, all the changes made at each of the vertices will be applied to the drawing.