okular

Annotating PDFs

Make sure PDFs are opened with okular

$ mimeopen -d path/to/document.pdf
Please choose a default application for files of type application/pdf

	1) Atril Document Viewer  (atril)
	2) GNU Image Manipulation Program  (gimp)
	3) LibreOffice Draw  (libreoffice-draw)
	4) Okular  (okularApplication_pdf)
	5) Inkscape  (org.inkscape.Inkscape)
	6) Open on connected device via KDE Connect  (org.kde.kdeconnect_open)
	7) Other...

use application #1

$ xdg-open path/to/document.pdf

See also