Use a DITA HyperPopup or HyperJump PI marker to identify a hotspot, and type the reference string as the PI marker text. Place the marker anywhere in the hotspot; the span of the hotspot is determined by the character format applied to text containing the marker. If no character format is applied, the entire paragraph becomes a hotspot; see §17.8.2 Creating hotspots for jumps and pop-ups in WinHelp.
Note: Do not place any other PI markers within the hotspot area.