Organize PDF study notes into one useful revision pack
Choose a predictable order such as syllabus sequence or exam weighting. Keep full readings in an archive and include only high-value summaries, diagrams, formulas and examples in the master pack.
Clean and combine
Remove duplicates and blank pages, rotate pages, extract useful sections and preserve source references. Merge one topic at a time, verify each transition and compress only after the order is correct. If the final file is slow to open, create one PDF per major unit.