Must contain: - [ ] factors: sample_id, condition, patient_id, cluster_id (Group By/ Color By/ Label By/ Facet By/Shape By) - [ ] clustering selection: (meta or SOM) - [ ] Controlled Vocabulary character(): (Stacked or dodged/Scale/Samples or Clusters/Marker or cluster_id) - [ ] Expression: assays (Raw or Normalized) - [ ] Features: feature module - [ ] Marker module - [ ] subselection? check preprocessing