You can view and edit region parameters in the Region inspector, located in the upper part of the inspector. When a single region is selected, the title bar of the Region inspector shows the region name; when multiple regions are selected, the title bar shows the number of selected regions.
The Region inspector shows parameters for the selected region or regions, including Quantize and other parameters. Some parameters are available for only audio or MIDI regions, while others are shared. There are additional advanced quantization parameters that you can view and edit by clicking the More disclosure triangle.
You can also open the Region inspector in a separate floating window.
When Show Advanced Tools is selected in the Advanced preferences pane, additional parameters appear in the lower part of the Region inspector. You can view and edit these parameters by clicking the More disclosure triangle.
Open the Region inspector in a separate window
Choose Window > Open Region Inspector Float (or press Option-R).