While Signature templates are discouraged we do allow users to have them here. Signatures that are not sign will have the {{Unsigned}} template.
There are several restrictions you must follow when creating a customised signature:
- No Word Bubble. They take up too much space in a talk page.
- If you are using a template for your custom signature (such as {{User:Username/Sig}}), you must enter {{Subst:User:Username/Sig}} in your preferences. That will make the codes short.