The fix spelling and grammar feature is great for small bits of text, but sometimes if I end up doing a lot more, like a couple pages for a quick check before sending, some little punctuation changes are hard to make out. It would be good if there was maybe a bar along the side of the text to show which lines have changes. For example, in Word, when using track changes simplified view, the red line shows in parts where there have been changes. Maybe a similar concept would be good for Kerlig.