How to add an image or custom component at the top of a design in Sanity.io

Also, how can I do something like this where there is an image or a custom component at the top that shows what the design looks like on the front end? I screen shotted this from a Tinloof video.

Hi it's late rather than early over here, but glanced at this, and if I understand what you want, a custom input component on the schema (rather than on a field) will do this.
Here's an example of the pattern, with some screen images as well as source. It was a concept workout, and for most purposes you would put the content in another schema's documents rather than in the same document as I did in a sketch-up here, but the principle could be used either way.


https://sanity-io-land.slack.com/archives/C9Z7RC3V1/p1685880588321169?thread_ts=1685619549.311019&channel=C9Z7RC3V1&message_ts=1685880588.321169
It started out as just an answer to how to nicely get the image in Sanity, but weil be basis for some guides to write up before long....

Cheers,
(Removed Name)

(moved to a thread, where had been intended,)

Maybe I misunderstood what you wanted here (esp. since I figured you knew how to do this)? Was it actually to put such an item above that preview list you were working on?
I'm not aware of access to do that, if there is any....

, you understood perfectly. The thread you referenced with (Removed Name) is precisely what I was looking for. Thank you so much!

Most welcome, then, (Removed Name) :)
It does feel a pretty useful move, so I want to get it written up with the full arrangement -- a few things ahead in line :) . You take care...