The fastest way for testing Dynamic Type while developing, and to quickly see how your app's UI flows, is by using the "option + cmd + plus/minus" to increase/decrease the text size in your simulator.
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The Accessibility Inspector lets you configure on or off some of the most common accessibility options so you can conveniently observe how your app adopts these options in the simulator or device. You can also quickly select different text sizes.
Text Size is one of my favorite Control Centre controls. It lets you quickly change the Dynamic Type size, of the whole system. But also, you can now specify a different setting per app. Also, check out Dark Mode, Magnifier, Sound Recognition...
A common example where you need to manually configure the button accessibility trait is for some table/collection view cells. These tend to be “buttons” that perform an action, like playing music, or bring the user to a different screen.
