Single element regression with multiple alignments

Question

I was looking online for some resource on an unrelated topic and came across this document by Bentleys Richard Bradshaw

On page 8 of this document it mentions the fact that you can regress concentric curves at a set offset on two or more alignments. Obviously this would be really useful in crossover design in rail. My question is how to enable this feature? I could not get it to work with the instructions detailed on the PDF. I have been playing around with the Add Ons and variables in Power Rail Track to see if I can get this to work, but to no avail. 
 
 Would appreciate any help 
 
 Thanks A 
 Power Rail Track 08.11.07.658

R. W. Bradshaw · Accepted Answer

In the Edit / Review list view, press <Ctrl> with the right click and the menu will expand to include other alignments that include regression points. Just select each additional alignment and it will be included when you for "Select and Regress". 
Regards, 
R. W. Bradshaw

R. W. Bradshaw · Answer

It uses the preferences from the Annotate Profile command, but they do need to be saved in the .xin file. The last entry in the tree view has some preferences that override the Annotate Profile preferences (i.e. all data for a single alignment is red, or whatever). And that last entry also defines the settings for defining the alignment name, etc. 
Regards, 
R. W. Bradshaw