Hi Erick,
It is not currently possible to edit attached photos via the Inbox. We do hope to support this in the future, and I will add your request to our existing logged issue. Please refer to the links below which provide documentation related to this limitation.
Enable editing
Talk Like a Pirate Release (2.4)
"As of this release, the Inbox lacks support for downloading attachments. That is, you can use the Inbox against a survey that includes attachments, but the Inbox will not populate signatures, annotated images, audio or image questions. All these types of questions will appear empty, as if they had no data. As for the rest of questions, you will be able to download data for them and update them as well.
Also, to play on the safe side, when you edit surveys from your Inbox we will disable editing on these types of questions. This means that if you open a survey from your Inbox to make edits to it, all questions of type image (photos, signature, annotate, draw) as well as audio questions will appear not only empty, but also disabled. This is to avoid people from accidentally attempting to change data in them.
We are considering adding support in a future release for editing attachments."
Regards,
Brandon