Hi. I am working with Architectural documentation, heavy line blueprints and images of a park in a collaborative project between studios in different countries. I must say Adobe Acrobat doesn't handle heavy line/image files smoothly. The app usually lags and behaves erratically. I ended up switching to Wondershare PDF. I am not sure what exactly is different in their solution, but it just opens the file as I expect. I am not sure how to help you out. I can not share the file. But I think it is important to tell you that Acrobat isn't handling work files smoothly on my end. Thank you