As noted, copy + paste to some (other) open document … but …
What has not be addressed is the unstated yet perhaps lurking in the background desire to have the copied snippets hyperlinked back to the source content.
Does DT or DT + (some other app) offer a method to drag + drop content from a DT document to another “collection bin” document (in DT or in the other app) while maintaining a hyperlink back to the source content?
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JJW