The contents of a tab, its text, image and other parts, are defined using the Tab Edit Dialog. On the Tabs page of the property pages, select a tab and click "Edit Text, Image and Parts...", or double-click the tab.
The dialog shows a preview of the tab, the tab's properties and its parts. Parts are added, removed and reordered using the list of currently defined parts; the properties of the selected part are shown below the list (see Tab Text, Images and Parts).
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