- open the attached database document
- open the contained report for editing
- click the "Label Field" icon in the toolbar, this way entering a mode where
  you, with the mouse, can create a label field in the designer
- click onto the existing "ID" field in the report design, and move the mouse
  while holding the mouse button down (doing as if you want to create a
  new label field)
- release the mouse button
=> Now every mouse move draws a dashed frame to to position where you pressed
   the mouse, as if you were still in control-creation mode (which you aren't
   anymore, since you released the mouse button).

Now, it's pretty difficult to leave this "zombie mouse mode" - you need repeated
clicks/releases of the mouse for this.