Self mirror
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There a wording say TOP(mirror on the right), don follow it. turn up side down with the TOP at the bottom(mirror on the left), this will solve the problem of you in the mirror frame but pic come out top cut off.
view finder
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Whatever u see in the viewfinder, it will appear to be abit zoom out of the original subject.
meaning if u take a rectangular shape frame to frame....come out will be a border around the rectanglar.
my 7S, instead of look straight into the viewfinder, my eye need to go up and look slanted down abit then the pic will be center. sold away already so cannot test to show u all.