To view step by step guides for the various email platforms, please visit the following links

Outlook (Desktop): https://signature.email/guides/how-to-add-signature-in-outlook

Outlook (Online): https://signature.email/guides/how-to-add-signature-in-outlook-online

iPhone Default Mail App: https://signature.email/guides/how-to-add-signature-on-iphone

For all others: https://signature.email/guides