This guide explains how to zoom in and out (i.e. make text larger) using keyboard shortcuts on Windows and macOS.
Become a Keyboard Master How to Zoom In and Out Using Computer Keyboard Shortcuts
You can always hold down Ctrl and then scroll with your mouse wheel, but if you're limited to the keyboard or want to zoom with one hand, you can also use Ctrl + + (plus). Pressing it once will zoom web browsers and some other applications by 10 percent. Each time you press it, the zoom increases by 10%, so you can zoom in as far as you want, though most applications will cap out at around 500% (depending on the application).
To zoom out with the keyboard, the scroll wheel trick still applies; you simply scroll down instead of up. You can also press Ctrl + – (dash) to zoom out, again in 10% increments. Each press zooms you out one step, with most browsers limiting you to zooming to only 25% of the original screen size.
Zooming in and out isn't possible on the Windows desktop, but you can scale icons and other interface elements using Windows display scaling.
