On the ribbon, click Home tab Project panel Project Manager Project Setup.
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 linetype you want to change.
On the Class Settings pane, do one of the following:
If you are modifying a component, under Symbol, in the drop-down list, click the symbol you want to modify. Click Edit Symbol.
If you are modifying a line, under Line, click Edit Line.
In the Settings dialog box, under General Style Properties, locate and click Tagging prompt. In the drop-down list, click one of the following options: