How to put a border around points in estimation plot

Hi everyone,

I've created an estimation plot and can't quite figure out how to put a border around each of my data points. Any ideas? Here is my final code which generates the graph:

plot(two.group.unpaired.meandiff, palette = c ("lightskyblue3" , "sandybrown"))

It is not clear to me what you mean by a 'border around each of my data points' .
The standard plot plot(1:2,1:2) provides a circle border around the two points [1,1] and [2,2] .
This is obviously not what you mean. Therefore: be more explicit about what you need?