When writing on my desktop, it would be really nice to have the ability to pull up a notepad next to my document for outlines, summaries, character lists/descriptions, etc. As it is, I either have to include all that in the main document, which is bulky and inflates my word count, or I have to have it all it a separate document, which is clunky and annoying.
Even having the option to open two documents next to each other would accomplish this, although that might make it more difficult for Claude to grasp.