How do we add labels to layers that carry over with our symbology? For instance, our slope raster is in degrees and the layer appears with the unit 'Degree °' in ArcMap.

Could someone refresh me on how we do this in Arcmap? Also, is there a way to do this in QGIS as well? Any help would be great. Thanks!
How do we add labels to layers that carry over with our symbology? For instance, our slope raster is in degrees and the layer appears with the unit 'Degree °' in ArcMap.
Could someone refresh me on how we do this in Arcmap? Also, is there a way to do this in QGIS as well? Any help would be great. Thanks!