Start with the rectangular boxes: they give a description of what's happening in the scene.
Next, read the footnotes at the bottom of the page before reading the rest of the text. This way, we already have an idea of what the new words/phrases will mean so we can read the dialogue more smoothly.
Speech bubbles are read left to right, top to bottom - in each of the graphic novel boxes. The lines of speech in these are taken directly from the play - they are Shakespeare's words.
Once we had the hang of this new text format, we were ready to roll. Students were divided into small groups to read the page of dialogue together ... repeatedly. We discussed that Shakespeare wrote plays, not novels - so they were intended to be spoken aloud and acted out. After some time in small groups, one group took "the stage" - our room is now set up as a theater in the round, with the desks marking the stage boundary and gaps here and there serving as entrances and exits.