Is there a particular reason to do the splits in preview?
In the OCR'ed junk I work with, chapter starts are not always located on a paragraph, but on a break.
If you do the split on the desired location at the chapter break, then it breaks at the beginning of the paragraph before, including material in the following chapter, or leaving out the chapter start.
Since it is necessary to inspect the HTML anyway, how about at least the option for a split in the code panel?
Thanks for the option to unsync the two panels. It would have been very helpful when I was doing alterations from paragraph to heading...if I had remembered to use it because updating with them synced takes forever!
