Hey @dacker ~ Welcome to the Community!
If you are referring to the Gmail Integration and the Emails & Activities App, then you can indeed add signatures to your emails!
There shouldn’t be a limit to the Pro Plan for this ability, so to the best of my knowledge you should be able to add this on the Standard Plan.
If you are having issues with this at all, please contact email@example.com and our Support Team would be happy to troubleshoot with you
In the meantime, you can find signature instructions for both features below:
As for templates, the Outlook Integration and Gmail Integration are effectively already “templates” as they send out the same message to the appropriate person/email based on a specific trigger:
For the Emails and Activities app, you can find instructions to create templates on it here:
I hope this helps! Remember to mark as solved if this answers your question