I am new to ArcGIS Online and have watched many tutorials and promotional videos. I have seen point shape files being edited by dragging points to a new location. What I would like to do is edit the vertices in a line shapefile. I've played around quite a bit in my trial version of ArcGIS Online and found that I can add new lines to a line layer, but I can't seem to be able to edit the vertices in an existing shape. This is something I really need to be able to do because I have people working in the field who will be doing this type of editing. How do we go about doing this?