Please don’t post in the Alpha/Beta forum unless you’re actually testing the alpha/beta version of WordPress (not a plugin or a theme). Also, once WordPress has released a version, it’s not appropriate to post in alpha/beta and you should post in the How To & Troublshooting forum:
https://ww.wp.xz.cn/support/forum/how-to-and-troubleshooting
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All of that is in the second row of toolbar buttons. The right-most button in the first row of toolbar buttons in the Visual editor tab has a button which displays or hides the second row of toolbar buttons.
You’re welcome, no apologies necessary, everyone makes that mistake. 🙂