Thunderbird version '''91'''.xx and older used to have an option in the ''Composition Toolbar'' of the [''Write''] window to '''insert a digital signature'''. See attached '''digisig_TB91.jpg'''. From Thunderbird '''102'''.0 onwards that '''digital signature option is removed''', though its settings in [Account Settings > End-To-End Encryption] are still there. See attached '''digisig_TB102.jpg'''. Shall the digital signature option in the ''Composition Toolbar'' ever return? P.S. 1. Yes, yes, I know. I can still insert a digital signature, but switching the function ON and OFF again in [Account Settings > End-To-End Encryption], is an annoyingly time-consuming hassle. 2. Do not confuse with encryption. That's a totally different function and purpose.