Hi there,

You can change them here http://take.ms/sWMmH. Left it blank if you wanted to remove them.

In order to change font, you need to do some custom css in order to achieved this. You can apply css codes(for example) below accordingly at this sections http://take.ms/WgwDl0
[gist type="css"]
#es .es-login-box__msg-title {
font-family: "Times New Roman";
}
[/gist]

Please give it a try and see how it goes.