CNN  — 

Included in the government’s latest court filing — in its effort to investigate Donald Trump’s handling of classified materials — is a single, tantalizing photograph showing an array of documents found on the property of the former president’s Florida resort.

Taken by the FBI, the photograph shows several documents labeled with so-called “classification markings.” These government codes are designed to indicate the sensitivity of the information they refer to — and the rules for how it is meant to be handled.

Although the contents of the more than 100 classified documents that were recovered from Mar-a-Lago remain unknown, the government markings on this handful of pages offer intriguing clues about the sensitivity and provenance of the information they contain.

CNN breaks down what we can learn from the markings in the photograph.