From : Blog Entry>>ILTA’s Blog Entry
Creating LINKS To Places In Same Document in Power PDF   On the Edit ribbon in PowerPDF, click on Link A + will pop up, so select the word or prhase you want to link something to. This box will pop up:   Here you can choose whether the box around the word/phrase will be visible or not (usually, you do NOT want it visible).  Change Visible Rectangle to  Invisible Rectangle. On the Link Action: for linking to INSIDE the SAME document, change it to Go to a page view.  [More]