"Berber" Ancestry

A feature Ancestry and 23andme must (re)introduce is a chromosome browser that shows the user where exactly their DNA matches another user's. MyHeritage, which is less accurate, already offers this feature for free. However, since their DNA estimates are less accurate, we are forced to use DNA Painter's features to copy the chromosome breakdowns from 23andme or Ancestry to see the assigned "ethnicity" for sections of each chromosome. This convoluted process creates more work, and should be something available for free on Ancestry and 23andme. Doing so would illuminate how exactly one shares DNA with other users. This feature on My Heritage shows us, for instance, where we share DNA with North Africans. In the above example, with someone of Algerian heritage, we share 9.3 cM of DNA on a section of my third chromosome assigned to "North African" by Ancestry. This suggests that we likely harbor small amounts of "Amazigh" ancestry that can still be matched with random people from Morocco and Algeria. In our case, since we do not know of any recent admixture, we assume this is from one (or two) of 2 scenarios: ancient "Guanche" admixture from ancestors who came to the Caribbean via the Canary Islands or via ancient "Berber" admixture in parts of the Iberian Peninsula which contributed to the early peopling of the Spanish Caribbean. Either way, the fact that we have found multiple matches who share segments of DNA on parts of our chromosomes assigned to "North Africa" suggests "Berber" admixture. We need this feature to facilitate understanding of our West and Central African matches from places like Ghana, Nigeria, Sierra Leone, and other countries. It would also be very useful when looking at matches who are a mix of different African nationalities.