You all are great!
1) I've added the raster using, <File>, <Add Data>, <+Add Data>...
2) Then, attached my PNG (pseudo-thumbnail sample is attached).![ScreenCapture_Layers1.PNG](/legacyfs/online/103829_ScreenCapture_Layers1.PNG)
3) The image does not show on the may itself yet, but also has some RGB references on the layer panel (see thumbnail).
![ScreenCapture_Layer-ActualImage.PNG](/legacyfs/online/103830_ScreenCapture_Layer-ActualImage.PNG)
4) I went to the <Georeferencing> dropdown menu, and the only way I could get it to show on the map as a layer was to choose <Fit to Display>, but that's obviously a mistake, b/c now it appears I'll have to delete the layer becuz it does not match with the county line/boundaries of both this raster layer and my basemap (U.S. Roads), UNLESS there is still a way to adjust it to match my basemap, as it does not match up to the county corners...
I don't expect you guys to walk all the way thru this with me, BUT... perhaps it can help others get the hang of the concepts by doing thru my trial and error and learning.
~JG