If you want to take notes about a document in your DEVONthink database, there is a feature for exactly that: the annotation. This is a specialized note document attached to another document. Here is how to create and use them.
When it comes to PDF documents, what you see and what is actually there can be two different things. Just because you can read words in the document doesn’t mean it is searchable. Or perhaps you have a searchable PDF but it’s still not found in a search in DEVONthink. Here are a few ways to deal with such PDFs.
