See document text in the UI for testing purposes

Rn all I see is this:

I want to check if the content is what I wanted it to be

From what I understand you ingested a document (e.g. a PDF) into your Vectara corpus. This shows the document ID and metadata. Do you want to see the text of the original document?
This can be available via the API when you ingest the file (but not in the console) - File Upload API Definition | Vectara Docs. If you set d=True in he request, the API call returns the extracted document that was indexed.

I ingested a .txt file

Yes I want to see the text of the original document in the console

Sorry, that is not possible in the console currently.