Overview results for NGC 6121. Panels a and b present the m_F150W as a function of (m_F606W − m_F150W) and (m_F814W − m_F150W) CMDs, respectively. We plot m_F150W as a function of PM in panel c. In all these panels, gray points represent field stars, while all other colors refer to cluster members according to their PMs. Black open circles and dots are unsaturated stars measured in the Northern and Southern fields, respectively. The corresponding symbols in red mark saturated sources in NIRISS. The blue dashed line in panel c was used to infer cluster membership. Panels d and e show the VPD for unsaturated and saturated stars, respectively.