Dink is a new UWP BETA application to read and modify PDF.
Annotations can be made by pen, using Windows INK, compatible with Windows 10 and Windows 10 Mobile, you can add annotations even in Windows 10 Mobile, through touch.
The pdf can be added to notebooks, using drag and drop, to be opened quickly.
Also the new app version gets the following features:
+ Now you can view PDF with passwords
+ Now you can create PDF