text or image for pre-checking external documents

[intermagic]

Hi,

it would be great if it will be possible to insert text or an image in the item details pane of an selected item, if there is a document for external viewing/ editing selected.

In other words: Actually I can't see the content or a hint for a document if this document can't show in the internal (browser) viewer.
If I could insert a screenshot or a sample text in the item details pane I could see the necessary facts about the document without the need to open it externally.

Thanks and bye

Ralf