There are no line spacing options in settings. And settings is hard to access without the gear icon.
provide option to reduce line spacing in settings
17th
ranked

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Allison Andrews commented
The line spacing seems to assume everyone has a tablet with fat fingers, so we don't get to see as many messages now, and don't have the ability to control it either.
In the user GUI world (of which I have some experience), that is a fail.
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Mark Giebler commented
Why have you deleted or hidden so many of the icons. Is it supposed to be like a fun little game, searching for the hidden or missing icons? Having to go through more steps to do the same things as before. I hope this isn't some goofy A.I. program designed to streamline things... because it's not!