- In the Project Setup tree view, expand P&ID Class Definitions.
- Continue to expand the list until you locate and click the component or line whose linestyle you want to change.
- On the Class Settings pane, under Line, click Edit Line
- In the Line Settings dialog box, do the following:
- Under General Style Properties, locate and click Sline type. In the drop-down list, click an Mline.
- Under General Style Properties, locate and click Mline style. In the drop-down list, click a new multiline style.