map viewer background color

Question

Is it possible to change the map background color in the map viewer?

By default, it's white color.

I am not talking about the base map, although it's possible to be done by creating a single-colored area covering a large geographical area (the whole world...)

AdrianWelsh · Answer

No, other than masking, there are not many more options. Masking might be a bit of a challenge to make it look seamless though (due to the jagged-ness of the coast line).

RebeccaStrauch__GISP · Answer

That is expected behavior...basemap will always draw first.  When I mentioned about a blue polygon, I meant one over the water only, with the coast as the one edge.  In ArcMap, this old-school workaround or masking is fairly straight forward (although othr ways to do that now too). With Online, this isn't as straight forward.

Maybe someone else has a better idea, know that what you are trying to do is a little more clear. Do you hve any more ideas MidnightYell2003  ?

simoxu · Answer

Tried to put a big blue polygon under the cached base map and group them together as a multi-layer base map, but in the multi-layer base map, the polygon will always be drawn on top of the cached map, regardless the sequence they appear in the grouped base map. reference layer in the base map does not work either.