Annotating and marking up PDFs. Drawing in apps such as Inkscape and Arita. Working up 3D models using OpenSCAD Graph Editor. Taking notes w/ a pen in class

Annotating and marking up PDFs. Drawing in apps such as Inkscape and Arita. Working up 3D models using OpenSCAD Graph Editor. Taking notes w/ a pen in class using Write by Stylus Labs or Journal.