Any way to make plot points in scatterplot more transparent in R?

Any way to make plot points in scatterplot more transparent in R?

r plot ggplot2 alpha

r

Adjust Transparency (alpha) of stat_smooth lines, not just transparency of Confidence Interval

r ggplot2 transparency alpha

r

How to set ggplot alpha (transparency) value for all points at once

r ggplot2 alpha

r

ggplot2: different alpha values for border and filling of geom_point

r ggplot2 border alpha

r

ggplot2: Set alpha=0 for certain points depending on fill value

r plot ggplot2 alpha fill

r