Adding new map-able layers to a project automatically assigns a color. I haven't yet figured out according to which criteria or setting ArcMap choose which color to select - to me they appear to be always different and somewhat random. So I'm curious if anyone knows where this is defined and how it can be manually set.

I found this related post which hints that it might be defined through a color scheme - maybe even a random one?

Tl;dr: Does someone definitely know

  • which color scheme does ArcGIS 10 use by default
  • where can I change this setting

If you are looking for default color schemes used when opening files in ArcMap they can be changed here.

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