I’m thinking of using a global variable for a partial text string that is part of several email alerts, but I also need to insert a device serial number in to the message, so my question is: can I use a payload variable inside a global variable, or do I need to assemble it in several parts?
You cannot use a payload variable inside a global variable. As you mentioned you’ll need to assemble your email message in parts.
Since the email body is templateable, you can use workflow globals to hold constant snippets that you will reuse every time, and reference them in the email body as {{globals.<variable-name>}}
Thank you,
Heath