Allow Line Pattern (Solid/Dashed/Dotted) as a Vary Symbology by Attribute Option

[BeauMilton]

ArcGIS Pro currently allows symbol properties to vary by attribute for Color, Size, and Transparency, but not Line Style/Pattern.

Utility, telecom, pipeline, water, sewer, and transportation users frequently need to symbolize:

• One field controlling color
• A second field controlling line pattern (solid, dashed, dotted)

Example:

• Phase → Color
• Construction Type → Solid vs Dashed

Currently this requires duplicate layers, combined fields, or large numbers of symbol classes, which creates significant maintenance challenges for continuously updated datasets.

Please add "Line Style/Pattern" as a Vary Symbology by Attribute option alongside Color, Size, and Transparency.

[JesseWickizer]

You can configure the dash pattern if you Allow symbol property connections. 

Then in the symbology for the line feature you can configure the Dash template to reference a field or an Arcade expression.  

Use a custom Arcade expression to specify the dash pattern for different attribute values. Here's a sample script using your example. Note that the solid line uses a dash pattern with a dash width of zero.

Decode($feature.Construction_Type,
  "Not Started", "2 10", //dotted pattern
  "Under Construction", "5 5", //dashed pattern
  "1 0" //default to solid pattern (Construction completed)
);

And here's what that looks like on the map: