Hello,
By default indeed it will just export data about the global shape (mean intensity for instance). If you want to have the profil along the line then you can use the Path Intensity Profil plugin (just type its name into the search bar of Icy to access it).
It will produces you a table (that you can export in XLS) with each points of the line providing coordinates and intensity values:
Hope that helps !
– Stephane
