Hi all,
Sorry if this is in the wrong place for this. I've been looking online for something akin to Esri's light grey canvas base map but without the national boundary lines. My work concerns the pre-modern world, so those lines are not applicable. Is there a version out there without them, or a simple way to remove them?
I haven't done this personally but I think using a customized Vector Basemap might be what you're after. Here's a link to the basics.
You could add the Oceans basemap and then remove the reference layer you get a result like this
Alternatively you could create and publish a vector tile package and upload to ArcGIS Online. -