Insert Diagram Properties Note
Properties of a diagram can be displayed on screen within a custom text box.
You can move this text box around and change its appearance. You cannot change what the text box says.
To create the note, drag the Diagram Notes element from the Common page of the Toolbox onto the diagram.
Alternatively, select the Diagram | Property Note menu option, or click on the Diagram Properties Note button on the UML Elements toolbar and click on the diagram.
This is not the same as the diagram details note, which displays in the top left corner of the diagram if the Show Diagram Details checkbox is selected on the Diagram Properties dialog. You cannot move the diagram details, nor change the appearance. To hide the diagram details, deselect the checkbox.