This screenshot is of the version suitable for smaller monitors with the text window shrunk.
The board size is adjustable. Fonts and font sizing are completely customizable.
Each level covers how to see the board and what rules to follow. There are interactive tests to confirm you understand the rules and a printable crib sheet to glance at as you take live action testingof your understanding in whole board games. You play along with the original players - guessing the correct move for your level of understanding and seeing where the original players got it right or so very wrong. Should you get it wrong, Dojo reminds you which rule youre breaking and lets you try again until you get it right.
Bruce Wilcox's Go Dojo is a Windows compatible software program (also works under WINE in LINUX) used to display teaching material that includes text, go diagrams, quizzes, etc with an interface designed to support large amounts of text. (For those of you familiar with SGF annotated games, think of Dojo as the next-generation SGF viewer. SGF was designed to display positions, text and annotation, but has no hyper-text linking capabilities, no testing support, etc, and most games with SGF commentary actually say very little at a node. Dojo goes way beyond all this.)
Also included is Kogo's Joseki Dictionary (http://waterfire.us/joseki.html) for studying joseki.