[maintech]

I have a large pdf file that contains over a hundred and thirty songs. How can I split each song out of the total. When I edited the individual songs, providing the start and end page # to have them displayed in lists, I also named that individual song. I believed that the program would copy just those pages for that song. However I now suspect that for every copy of a single song, there is also a duplicate of the original 130+ songs as it's source file. (I found that if I page forward the next song is displayed, not the end-of-song notice.)  How can I check to see if that large file is duplicated many times, and if that is the case, how can I separate the original into 130+ PDF files and save memory?