Styling Relationship Types: Lines, Arrows & Routing

Every Relationship Type has visual settings that apply to all connections of that type on the canvas. Select the Relationship Type in the Model Navigator and adjust these in the Properties panel.

Color & line style

Color — pick a swatch or a Custom hex color for the line.
Line Style — Solid, Dashed, or Dotted.

Directionality

The Directionality dropdown sets the basic direction of the connection:

Unidirectional (-->) — points from source to target (the default)
Bidirectional (<-->) — points both ways
Undirected (---) — no direction

Arrowheads

Fine-tune the symbol at each end:

Start Style (Source) and End Style (Target) each offer: None, Filled Triangle, Open Triangle, Caret (>), Diamond, Filled Circle, Open Circle.

For example, a UML-style "composition" might use a Diamond at the source.

Routing

Routing controls how the line is drawn between nodes:

Rectilinear — right-angled segments (the default)
Direct — a straight line between endpoints
Bezier — a smooth curve

Labels

Toggle Show labels to show or hide the relationship's name on the canvas.

Good to know

Relationship Types can also carry properties (like a "since" date) and need Allowed Connections to define which Node Types they can link — see the related articles below.