If you have created associative embankments, you can easily modify them. For example, you can change an embankment type into another, change the length of lines etc. Click then click one of the lines consituting the embankment to edit. The following dialog appears:

The dialog shows the current settings of the embankment. You can then change these values or load them from a configuration file. In the same way you can change a normal embankment to a wide embankment and vice-versa.