This s a short clip demonstrating drag and drop page extraction using Acrobat DC.
If you like this video, please check out my PDF Commenting course at Lynda.com, where I have over two hours of content, specifically targeted toward this in AEC (Architecture, Engineering, and Construction) https://www.lynda.com/Acrobat-tutorials/Adobe-Acrobat-DC-PDF-Commenting-AEC/597013-2.html