From Reuters:
Conversations with some officials who have briefed Trump and others who are aware of how he absorbs information portray a president with a short attention span.
He likes single-page memos and visual aids like maps, charts, graphs and photos.
National Security Council officials have strategically included Trump’s name in “as many paragraphs as we can because he keeps reading if he’s mentioned,” according to one source, who relayed conversations he had with NSC officials.