As explained in this How to Technical Support Article, it's possible to determine the XY coordinates of the (lines or polygons) vertices from Edit tab > Modify Features pane > Edit Vertices pane:

XY coordinates of the vertices are listed in the Longitude (dd) and Latitude (dd) columns, regardless from the coordinate system of the layer.
There is a way to list the projected coordinates if the layer Spatial Reference is a Projected CS?
Roberto Rossi