In DTPO I create RTF files and can drop a pdf file. That works without problems. I would usually write a note for myself and place the pdf(s) below. But in DTTG, however, I can only see my note, not the pdf(s). Is that to be expected or I am doing something wrong?
It’s expected unless you check the option in Preferences > Editing > General > Display PDF attachments of rich text.
That option isn’t available on iOS 
/facepalm That’s what happens when you get up too early and not enoug sleep. 