Option to adjust geom_point stroke for FeaturePlot, DimPlot, etc to allow for smaller points

[liz-is]

I often find that when I'm plotting relatively small plots (e.g. 4x4 inches pdf) with many points, reducing the point size with thept.size argument to FeaturePlot, DimPlot, etc, seems to have no impact on the actual point size in the resulting plot. It's basically the same issue as described here. Based on the answers there, I made a custom version of SingleDimPlot where I set stroke = 0 in the call to geom_point (i.e., here). This gave me the desired output - smaller points with less overplotting at the necessary output size.

I was wondering if this change could be made in the code, or if you could add an option, similar to pt.size, that
would allow users to customise stroke width as needed?

[bschilder]

I'd find this incredibly helpful.
To the Seurat team, please do consider merging the PR by @samuel-marsh which appears to resolve the issue.

• Add stroke.size parameter DimPlot #8180