I have worked in a file previously where after modeling a corridor, you can edit each of the individual features with linear templates to model end conditions.
However, I have encountered a different corridor where the entire backbone template drop is treated like a block and when I hover over any of the features, I only see the following.
The only noticeable difference I can see is that in file 1 (the file that works), corridor features are recognized as complex elements under element information, but in the 2nd file, corridor features are 3D linear elements and contain corridor properties under element information.