Communication using popular digital media involves understanding multimodal systems of appraisal for expressing attitude, which traditionally deals with emotions, ethics, and aesthetics in language. The formulation and teaching of multimodal grammars for attitudinal meanings in popular texts and culture is currently underresearched. This article reports findings from multisite qualitative research that developed students' ability to use semiotic resources for communicating attitude multimodally. The research participants were 68 students (ages 9-11 years) from two elementary schools. Students learned how to use attitudinal language--affect, judgment, and appreciation--and applied this knowledge to multimodal design. The findings advance a leading system of appraisal for discourse by adapting the system to the multimodal communication of attitude in digital comic making in schooling. The research is significant because it demonstrates the potentials for augmenting students' linguistic and visual semiotic resources to convey multimodal attitudinal meanings in contemporary communication.