If you are a professional email writer and writes emails regularly to your clients and customers, it is necessary for your email to have professional signature in the end.  Without having a professional signature set, it gets difficult to change the format and font every time email is sent.  To avoid that you can simply set your own professional signature in your Hotmail by adding it so that it gets automatically added every time a mail is composed.  By setting a professional signature for all the emails you send from your end the signature gets automatically added.  At the time of composing a new mail you can add or remove any info you would like to change.  You can decide what information to add in the signature slot