On a computer
At the top right, click More (︙).
Next to “Zoom”, choose the zoom options you want:
▪︎ Make everything larger: Click Zoom in (+).
▪︎ Make everything smaller: Click Zoom out (−).
▪︎ Use full-screen mode: Click Full screen (⊞).
Click the menu button (☰) on the right. The customization menu will open and you will see the zoom controls at the top.
Use the (+) button to zoom in, and the (-) button to zoom out. The number in the middle is the current zoom level – click it to reset the zoom to 100%. You can also see the current zoom level in the address bar.