This article will help you manage your Profile details such as editing your Signature.
Log into your Identillect account via https://identillect.com using the Chrome browser (or Mozilla)
Select Profile (Located under your email address or on the left side menu list)
Here you can change edit your signature. (If you already have one created you can copy and paste it in.)
Once you complete the desired changes select Save Changes and refresh your web page.
*NOTE: Some changes will require you to log out then back in in to be viewed.