Louise, if you follow Sherry’s instructions below to add your case history link to your signature, the link will automatically appear every time you send a messsge (as mine does to this one). 
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Maxine and Indy (PPID) and Dangles (PPID)

Canberra, Australia 2010
ECIR Primary Response

https://ecir.groups.io/g/CaseHistory/files/Maxine%20and%20Indy%20and%20Dangles 
https://ecir.groups.io/g/CaseHistory/album?id=933