He pieces together his past by covering the walls of his apartment with Polaroid photographs , handwritten notes, and sketches.

In the context of the 2008 Bollywood film , "putting together paper" refers to the protagonist's desperate method of overcoming his short-term memory loss (anterograde amnesia) to reconstruct his life and pursue revenge. The Role of Paper in the Film

Much of the film’s narrative is revealed as other characters (like Sunita, a medical student) "put together" the story by reading Sanjay's diaries , which detail his past romance with Kalpana.

Because the character Sanjay Singhania (played by Aamir Khan) forgets everything every 15 minutes, he uses physical objects to anchor his memories:

His mind is often described as a "white sheet of paper" that becomes blank after every memory cycle, requiring him to constantly re-read his "paper-based" life to understand his mission.

In real-world promotion, the film's success led to the creation of commemorative items, such as a coffee table book that "put together" behind-the-scenes imagery and production details. Ghajini: The Best Film of 2008 - The Idol Cast

Character Sunita also uses newspaper archives to investigate Sanjay's background, literally piece-by-piece.