Neither custom metadata nor is showing Annotation files are currently supported in DEVONthink To Go. These things will come in time as the development schedule dictates. Thanks for your patience and understanding.
hi kapomuk
from my experience:
if you can convert that files to pdf documents
you can open with the symbol “overview of pages” inside the to go app the pdf file and tab the middle one named “annotations”
there you will see all annotations from a pdf document, and can jump to it.
but i vote also for all annotations seen in the dttg app. (: