The accuracy of comprehension monitoring affects the effectiveness of rereading, which in turn affects comprehension. Thus, much research has focused on finding ways to improve monitoring accuracy. The cue-utilization framework of metacognitive monitoring provides a framework for understanding how to improve monitoring accuracy. It suggests that accuracy is driven by cues people use to judge comprehension. When people utilize cues that are highly diagnostic of performance on a test of comprehension, accuracy should improve. Many interventions that have been shown to improve monitoring accuracy have attributed the improved accuracy to increased access to highly diagnostic cues, but have failed to identify highly diagnostic cues. In our recent research, we found that instructing students to generate drawings before judging comprehension improved monitoring accuracy. Using graphic analyses protocol, we identified highly diagnostic cues. In this chapter, we will describe the procedure we used to identify these cues contained in drawings.