I have a few 50x10 ranges which contain alphanumeric comments added by
the user. At init, some comments may be programmatically put in those
ranges and the user is free to add/edit/clear the ranges.

Is there a way to detect which ranges have changed? Exactly what cell
has changed or what value has changed is not important; identifying
that a change has occurred or that a comment has been cleared will
suffice.

I can store the initial comments in a duplicate range some place and
iterate cell-by-cell in VBA to compare but this may not be the best
way, so thought I'd ask. I'm assuming if a range is cleared, CountA
probably is the quickest way to detect this.

Thanks