Hello!
I typically use a 3rd party app for hand-written annotations to PDFs and then share the finished PDF to DTTG… so this is the first time I’m having the issue described below.
I’ve used DTTG to annotate a PDF on my iPad, with Apple pen. The hand-written annotations are legible on the iPad and in built-in Preview.app in OS X, but they render practically illegible in DEVONThink.
A small sample below. The garbled text is from DEVONThink on MacOS.