I am facing a problem, my shapefiles are in a GCS WGS 1984 and I have to add a new shapefile that is in a projected coordinate system NAD 1983 UTM Zone 8.
I have tried changing the projection to the GCS, and changing my GCS to a projection... but nothing seems to work.
I took a look to the similar questions and I tried changing the coordinate system and/or the projection with the "projections and transformations" tools (project). I also tried to project the files too.
The second image shows the shapefile I want to add to my map.
I am new in this community and I am also a new user of ArcMap.