What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
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I am not sure if you want to add logo image to Autoresponder or on Thank you page.
If you want to add image to Autoresponder, than inside of your Autoresponder settings click on Insert/Edit image option and enter URL of your logo image inside of Source field. You can also set dimensions. Same can be done inside of Email Notification as well.
If you want to add logo image inside of Thank You page, then click on Thank You Page option and select Edit Text. Then click on Insert/Edit image option and enter URL of your logo image inside of Source field. When you are done click on Save Changes.
Hope this will help. Let us know if you need further assistance.