Resources can be assigned a color.
This is done in the tree view of the assignment in the Color column in the resource directly under Default color.
If a color is selected for a resource, this resource is highlighted with this color in the assignment. By default, all newly created operators and machines are assigned a color. All assigned processes of an operator or machine are displayed in their color in the assignment.
Assign a color in the tree view
Assign a color right in the resource