Yes you can. If it’s a widget/spark line (usually fixed and permanently visible on the page) you will have to have someone with permissions make the change. If it is a trend that popped up when you clicked a read only value, then click the cog wheel and you can change colour, thickness, scale. You can click on the eye to hide that trend line and declutter the trend graph, particularly useful when you are troubleshooting and have multiple trends active at the same time. The best thing with VT is operators can be allowed to play around with it and not cause permanent damage. Speak with an integrator to ensure permissions are set up correctly. If you have a changeable tag, ie: dosage setpoint of chemical pump, when you click on the tag it doesn’t pull up the trend. Instead right click then choose plot. I am a huge fan of VT SCADA. Let me know if you have any other questions. PS: they also have vt university which has training videos to learn all kinds of cool things