How can I show text labels on buttons globally? How do I display text in addition to icons in toolbar buttons?

For example, I find some of the icons in the Preview app to be quite unintuitive.



Is there a way to set this globally across all apps?
I have not yet found a way to set this globally across all apps.

For the Preview app, you can right-click on the toolbar button or control-click, and then select "Icon and text" to get this result: