The default for Email Subject and Email Body can only be set in a Template, so that each time the Template is used the corresponding envelope has the appropriate default text. Within Templates you can also select the "Customize email and language for each Recipient" so that each Recipient can have the appropriate email text sent when it it their turn to take action.
Please change this so that we can set a default email subject.
Hello! I never get my questions about Maestro answered but maybe this time.
I’m using Maestro to send Webforms for completion, but I need to customize the subject line and body of the e-mail that Maestro sends to recipients.
I couldn’t find where to do this. This is the e-mail Maestro is sending:

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