The phrase "overall picture" refers to the complete understanding or view of something, considering all the details and factors involved. Full definition
The software, in addition to offering customer histories, provides social media data for each customer, giving workers a better overall picture of the person at the other end of the line. (entrepreneur.com)
Having a full thyroid panel done can give a good overall picture of your total thyroid health. (mindbodygreen.com)
Then there is the issue of overall picture quality. (digitaltrends.com)