Need git aliases?

I've used git on many other people's computers and they never have the shortcuts that make git nimble for me to use. Until just now, I had know idea how those aliases were set. From a cursory reading of the docs, I gathered that you can edit your aliases directly with git config --global -e. For example:

    [merge]
        tool = opendiff
    [core]
        excludesfile = /Users/jeremyweiland/.gitignore
        editor = mate -w
    [alias]
        st = status
        ci = commit
        co = checkout
        br = branch
        lg = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr)%Creset' --abbrev-commit --date=relative
    [color]
        pager = true
        ui = auto