Wondering if its possible to add a North arrow to a webmap?
Since you aren't able to rotate a map, north is always on top of your screen. I don't see a need to add a north arrow, which I am pretty sure, you can't add.
I may need to print this map.
North is at the top (it's usually a rare case when it isn't even in print), but we need to be potentially prepared for viewers with a wide range of cartographic literacy, including not knowing that north is up on the web map.
You could do this if you have ArcGIS Server and create a custom print service. Using the service you can customize and number of layouts for printing.
(but my guess is that is not the answer you are looking for)