Under the PxEditor menu, select Goto Source XML.

You see that the Px file contains a tag named <properties>. This section contains an entry for each Px Property configured in this Px page. In addition, each Px Property contains a record of which widget properties are linked to it. Note that the three labels have their background properties linked to alertBackground.

Notice that the paths from the Px Properties to the widget properties that link to them are stored in the form of slot: ORDs. In this example, they are easy to follow: The main content of the Px page has three label children, and their background properties are linked to alertBackground. This use of slot: ORDs is closely related to the use of the Preserve Identities option under the Px Editor section of Workbench options. For more information, see the About Preserve Identities section.

Each <property> contains a list of target slot: ORDs to the widgets that link to it. When you use the Px Editor to delete a widget, it also unlinks all its properties, deleting their associated <property> tags. This prevents a deleted widget's <property> tag from affecting a new widget that happened to be created with the same slot:ORD.

If you wish, you can copy and paste the entire <properties> section or individual <property> tags into other Px pages by editing their source XML in this way. Caution: Any target slot: ORDs that are not valid in the Px page may prevent that page from loading.