This function is available from the Corridor ribbon, Add menu, Horizontal Alignment. You can also use the Project Explorer panel context menu: right click in the tree and choose Add - Horizontal Alignment.
Name
Choose a unique name for the new horizontal alignment.
This option is disabled if you select From Design file as the alignments are already named in the target file.
Display in background
If selected the new alignment(s) will be displayed when other alignments are selected.
From Coordinate, Traverse, Terrain or LandXML file
If this is selected when you press OK, you will be prompted to create a new alignment with options similar to those from File | New.
From Location Design file
If this is selected when you press OK, you will be prompted to browse for the target file. See Location Insert File for more information.
From an Alignment
Duplicating the selected alignment.
Extracting an alignment using point codes from the selected alignment.