With axf:destination-type, you can create a link with a destination type defining how to display a link destination. Available values for the destination type include xyz-left-top (to display the contents at the left top of the window), fit (to show all), fith (to fit the window width to display), fitbh (to fit the drawing area width to display) and more. For details, see also "-ah-destination-type" in the online manual. In addition to the destination type, you can also specify axf:action-type gotor that indicates the external link destination URI as PDF, and then you can specify ID and page number as well as the internal link.