jitter
When navigating an email, i.e. scrolling to position a link in order to click on it, the view jumps back up to the top of the email. Totally annoying! There is no "Switch to Basic" in Settings>More Settings.
1st
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If you still find that the issue is happening, please see this help page for troubleshooting:
https://help.yahoo.com/kb/new-mail/fix-problems-mail-sln28075.html?impressions=true
Thank you!
Mail Support