Dear all

I have a naive question that I can't answer from reading the manual (because I don't understand it ). I estimate a model like this:

Code:
use https://stats.idre.ucla.edu/stat/data/hsbdemo, clear

logit honors i.female read
and want to calculate predicted probabilities that tell me something like "What's the role of Sex net of Reading?", but I don't understand the difference between these two options:

Code:
margins female

margins female, atmeans
So my questions are: 1) What's the difference between the two and 1a) what does the first option, i.e. not specifying an option give me?

Thanks and sorry for my confusion
Nora