Here are the steps you need to follow:
1) Creation of your signature
You can do it via this link: https://www.hubspot.fr/email-signature-generator
Then copy the source code (like below 👇🏼)

2) Copy it into Skaly
In Skaly, follow the following process:
Settings > Variables > Your email signature > Enable > Copy your source code > Enable

3) You can insert this variable in your campaign (only on emails)

You can now insert your email signature in your prospecting emails
See you soon !