The Barrier layer can be configured via a marker graphic (regarding to its selection symbology).

Barrier-Layer, Marker symbology
Property |
Description |
Symbol type |
Symbol type (Circle, Cross, Diamond, Square, X,...) |
Color |
Color |
Size [px] |
Size (Pixel) |
Angle [degrees] |
Angle (Degrees) |
Width |
Width |
Outline color |
Outline width |
Outline width |
Outline width |
Transparency level [%] |
Transparency level [%] |
Properties Barrier-Layer, Marker-symbology