Add another symbology class without other classes changing color.

[EricRice]

If I'm working with the Classified renderer for raster data or the Quantity renderer for vector data, every time I add a class all the colors on my existing classes revert to the colors on the color ramp that is currently selected.  Typically, I define my own colors for my classes, but sometimes I need to add/remove a class.  ArcView 3 didn't change the colors of existing classes when adding more classes.  I'd really like my selection of colors to persist when adding additional classes to my classification.

[JosiahGerber]

This is already possible if you use the "Add Values" button rather than the "Add All Values"

[EricRice]

Thanks for the tip.  Unfortunately, when working with the classified renderer for raster data, there is no option to "Add Values" or "Add All Values".  There is also no option for those if your using the Quantities > Graduated Colors renderer with vector data.  I believe your referring to the unique value renderer which is not something I'm using.

[ValeriaChavez]

Hi @EricRice!

ArcGIS Desktop is in mature support and will be retired March 1, 2026 so we won’t be considering this idea. We recommend that you migrate to ArcGIS Pro, our fully supported desktop GIS application.

What this Idea is asking for can be accomplished in ArcGIS Pro. Right-click on the data grid or histogram, choose insert break and the existing color classes won't change. 

Thank you for taking the time to share your ideas. We truly appreciate your contributions to continuously improving the software to help you do your work and look forward to what ideas you have for ArcGIS Pro.