Colour gradient legend for integrated dot plot

[laurenjade88]

I was wondering if it was possible to add a colour gradient legend on my dot plot for an integrated dataset. On a single dataset, the legend comes up automatically with the percent cells expressed legend, but does not when I have an integrated dataset. I have uploaded an image for reference. Is there a feature that can add the colour gradient legend to the integrated dot plot ?

Any help is really appreciated.

This is the integrated dataset (no colour gradient legend for average expression)

This is the single dataset where the colour gradient legend shows up