I often import large PDF documents containing text where I need to annotate similar concepts with an annotation. The idea is to be able to quickly access these annotations on each page I am reading.

Currently I have to cut and paste several of these annotations from sheet to sheet, then use the lasso tool to add them to the text I am reading. This would provide a very valuable research tool and method of abstracting concepts into pictures (cartoons or annotations) to help me summarize the information or concept from several sources.

The idea could be expanded to provide an index capability where I could see where all occurrences of an annotation occur and the text they may contain.

The search could be expanded to perform across notebooks to provide a single index of the concepts that are being researched.