Gaia G magnitude vs. frequency of the maximum oscillation power ν_max for red giants in NGC 6791 and NGC 6819. Dots are KIC stars, and star symbols are newly detected stars. Filled symbols are likely to be cluster members, and open symbols are nonmembers. The axes are oriented to make the plot similar to a color-magnitude diagram. The dashed lines show the regions in which cluster stars tend to line up in these diagrams and their 95% confidence intervals.