sander added a comment.
Albert, David, thanks for looking into this -- the problem seems to be a beyond my skill level. My hardware is a Lenovo Thinkpad Yoga, as in http://www.notebookreview.com/notebookreview/lenovo-thinkpad-yoga-12-review/ . I am not a stylus expert, said review calls it a "Wacom active pen stylus". I didn't have to do anything special to get it detected. REPOSITORY R223 Okular REVISION DETAIL https://phabricator.kde.org/D17929 To: sander, #okular Cc: davidhurka, aacid, ngraham, okular-devel, fbampaloukas, joaonetto, tfella, darcyshen