Hi
and thanks for your answer
but you most have misunderstand my ?
I use Windows 10 and Office 365 (Outlook 2013?)

I have an digital signature and I can attach my digital signature to e-mails - but then the digital signature is on to every e-mail I send and that is too cumbersom.

I want an easy way to attach my digital signature to just one e-mail when I need it. - To attach the digital signature (I allways have forgotten how to do it when I need it and use time to find out how) and unattach it again is a too cumbersom way.