Something else for you Trumpliars to deny, dance around, hide, and whataboutism.
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HOW DOES DECLASSIFICATION WORK?
There's also a detailed process for declassification with rules laid out under executive order. Typically, if a president wants to declassify something, he checks with the agency in charge, which has broad say in whether the information becomes public, Gerstell said.
If documents are declassified, there’s usually a painstaking process of blacking out what information still stays secret. “It’s not a question of a concept being declassified, or boxes of documents. It’s a word by word determination,” he said.
The declassification order must be memorialized and any agencies that are affected have to be notified, Moss said. The individual documents then have to be re-marked to show they’re no longer considered classified.
“It’s not clear what Jedi-like lawyers said that you could declassify things with a thought, but the courts are unlikely to embrace that claim,” said Jonathan Turley, a George Washington University law professor who was a Republican witness during the first impeachment proceedings against Trump in 2019.
The Justice Department has said there is no indication that Trump took any steps to declassify the documents seized from his Florida home.
Source: Can a President Declassify Documents and How Does the Process Work? – NBC4 Washington
Yes, there is a procedure
President Obama issued Executive Order 13526. The document is long, but it lays out the procedures for declassifying information, including all of the mechanisms involved (there's a lot of Federal agencies with fingers in this pie). Ultimately, there is this
Sec. 3.7. National Declassification Center (a) There is established within the National Archives a National Declassification Center to streamline declassification processes, facilitate quality-assurance measures, and implement standardized training regarding the declassification of records determined to have permanent historical value. There shall be a Director of the Center who shall be appointed or removed by the Archivist in consultation with the Secretaries of State, Defense, Energy, and Homeland Security, the Attorney General, and the Director of National Intelligence.
So there
is a process for declassifying material. Neither Trump, nor Biden, have rescinded this Executive Order.
Source: Does a US President have to file any paperwork to declassify information?