It's not Edge if it doesn't have these features!

Chris Cochrun , I can't deny the use of inking on Edge, specially over PDF files. I used inking to put notes on PDF manuals and textbooks when using the old PDF Reader from Windows 8/8.1, and would use Edge's inking space to do the same if necessary. I still use it to highlight stuff on webpages or help giving instructions to other people through chat. There's nothing like doodling arrows and circles/boxes to get the idea through.

But by experience Edge can't really work very well with all types of PDF files. It struggles a lot rendering very complex PDFs with intricate vector graphics and details, which are common in architectural reports, civil engineering projects and territorial planning. Those absurdely complex files are much better delt by Adobe's Acrobat DC, which render and scroll those pages much faster and efficiently than Edge, which almost crashes under the load.