La réponse n’est pas celle que tu croyais, mais cela tient quand même un peu du bricolage car cette fonction n’est pas prévue dans Acrobat (ni dans Reader).
La voici donc :
Calling a hyperlink in a new window
Although Acrobat doesn’t have a link code that will force a Weblink to open in a new window, here’s how you can make it happen without worrying whether your users have selected “Open Cross-Doc Links In Same Window.”
Rather than linking directly to the URL you want to open, create a link to an HTML document that contains no text. The HTML document immediately opens a new window itself, using HTML code rather than Acrobat’s syntax, and opens the desired URL in that window.
The Acrobat Weblink will be a normal link to an HTML page that has nothing in its body and includes the following line in its head:
For x, substitute the number of seconds that should elapse before the new link opens (in this case, probably zero), and for zzz, substitute the URL that should open in the new window.
