Evince seems to be able to open PDF Portfolios but it is a "hidden feature":
https://bugs.launchpad.net/ubuntu/+source/evince/+bug/1078583 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/986412 Title: Need to add support for PDF Portfolios To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/evince/+bug/986412/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
