Plots have default properties you can use to identify them. However, if you have custom data that does not match the existing properties, you can define your own properties. These properties are called user-defined properties.
You can organize sets of user-defined properties in groups called user-defined property classifications.
You can also use user-defined properties for points.
Note: You may also wish to review the following tutorial. While it focuses on user-defined properties for points, the concepts also apply to plots.
