Is it possible for respondents to upload pictures within the form?

Yes, you can add a "File Upload" field to your form if you want your form respondents to upload pictures through your form

You may also find the guide below helpful.

https://www.jotform.com/help/332-How-to-Create-Upload-Forms

https://www.jotform.com/help/29-How-to-Change-the-Allowed-File-Types-Extensions-in-the-Upload-Field

https://www.jotform.com/help/33-Changing-the-upload-size-limit

https://www.jotform.com/blog/26-Jotform-Now-Supports-Multiple-File-Uploads

I hope this helps. If you need any further assistance, please do not hesitate to get back to us and let us know.

Thank you.