I can not comment on the new mail format because I CAN'T GET INTO NEW MAIL FORMAT
I can't comment on the new format because I CAN'T GET INTO THE NEW FORMAT HELP

We’d like to look more into this, please send us a DM on Twitter at @YahooCare, containing your Yahoo ID and a screenshot of your experience.
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Edwin Hampton commented
Your "NEW" (April 2020) format is somebody's having a joke at the expense of us users!
For example, Moving a message to a folder takes longer, is MORE TEDIOUS than before you changed it! Before, I could hit two consecutive keys to move a message. Now, I have to place the mouse cursor, click on the down pointing arrow, move the cursor to the folder where I want the message moved and click on it, then click on "Apply"! MORE EFFORT TO OBTAIN THE SAME RESULT!
NOT BETTER (Worse), JUST DIFFERENT and requiring MORE Time and Effort than the older way!!!!! (I will keep my ad blocker ON, unless I have to temporarily turn it off)