In Revit, How to sketch and modify a railing in continuous staircase (From ground floor to top floor) ?
Its simple to sketch just use the command "Railing" from Architecture. Then you can draw the railing where you want and one more thing while using this this command you should be on top view.
For modify just simple click on the rails and go to properties window and click on Edit type where you can change the properties of rail or materials or dimensions.
To modify the length or design of the rail just click on rails and after that click on edit path from quick access tool bar.