The Ridge fields are advanced features that you do not always need to edit.
Location
This field allows you to specify the exact location of an eccentric ridge line.
Ridge Height
This field allows you to create roof slopes indirectly by specifying the ridge height. You might want to do this when framing one block into another such that the ridges meet. You can also use this value along with the upper level elevation in Structure Input Form to determine the mean roof height.