Hi Ivan Monev,

You will need to do the following:

1. Upload the signature banner somewhere on the internet, either into your own website or upload it as an asset to your Zendesk HC.

2. Create a global signature inside Zendesk that utilises the image URL of your banner. Follow the steps here on how to set up a common agent signature. - Adding an agent signature

Note: The agent signature in Zendesk uses Markdown to format the signature. - Formatting text with Markdown

You can also check out our article on How do I setup a Zendesk Agent Signature Template. This one contains some templates which you can copy and paste & update with your own details. :)

Hope this helps. :)

Best,

Amie