While trying to find something else, I fell on this thread. We're on Sept. 2019, and it's been way over due for an update about Stockcharts (I am a subscriber).
Usually, charts are displayed with adjusted dividends. To see the "unadjusted" dividend charts, you simply add an underscore before the symbol, like this:
AAPL (adjusted for dividends)
_AAPL (unadjusted)
But, maybe that question was answer since 2017!