You can force the software to redraw the graphic representation of your data, the drawing, by using the Update Symbology command in Smart P&ID. This command refreshes the graphic symbology (that is, line weight and color) of symbols in your drawing based on the current settings in Options Manager. The ApplySettingsCmd macro (delivered to the ..\SmartPlant\P&ID Workstation\bin folder) also updates the line settings, Minimum Connector Segment, and Routing Self-Avoidance.
The symbology and other settings defined in Options Manager usually take effect only in those drawings created after those values are defined. Updating Options Manager settings enables you to force changes in your symbology definitions to be reflected in the current drawing, regardless of when it was created.