For better user experience one of the most important rules is to keep the measure between 45 and 75 characters per line, this will ensure the text stays readable across the various situations in which it could be read.
I think it would be very helpful if you could provide this feature in one of the next releases.
cameron butler commented
@xavier this should not be merged with https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/34245754-word-count . We need to be able to count characters by line not just text box
Please merge with this post : https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/34245754-word-count
Please do ! Its really useful !
John Mindiola III commented
I completely agree with this as an option. Make it happen, Adobe!