Can I use the zoom buttons in Safari's toolbar to zoom text only?

I can use the zoom buttons (AA) in Safari 17's toolbar to increase the size of every element on a page. I can also hold alt/option to increase only the page's text size in the View menu (called the "Content" menu in my locale). I really like the toolbar buttons (I use them in both Safari and Firefox), and I really like zooming text only so as not to introduce horizontal scrollbars on narrow displays, but I can't seem to use the toolbar buttons with the alt/option modifier to get the same effect as in the menu. **Is there a way to adjust text size from Safari's toolbar?** If I remember correctly, in Firefox, for comparison, there is a permanent option to "Zoom text only" which solves it there.