It seems that one can not highlight inside the "i" resource information pane. For instance, I was looking at Moo's Romans' (NICNT) resource information pane and it said: "He also critically interacts with "the new perspective on Paul," highlights Romans's emphasis on "practical divinity," . . . "
Unless I slept during this part of grammar, I think "Romans's" should be "Romans'" (drop the second "s")
Anyway, it seems impossible to select any portion of that text within the info pane.
