You can also zoom in and zoom out your screen on a MacBook Pro trackpad. Zoom Out: Press the key and scroll down with the mouse. Zoom In: Press the key and scroll up with the mouse. To summarize, here are the Mac/iMac screen zoom commands:

Note: If this doesn’t work on your system, scroll down to the “Not working?” section below, where I describe how to fix this problem. The entire Mac screen zooms in and out, just like the “software zoom” on a digital camera. If you’re using a Mac desktop system (iMac or Mac Pro) with a keyboard and a mouse with a mousewheel, just press and hold the key, then scroll the mousewheel up and down, and you’ll see what I mean. Note that this solution has been tested on macOS (formerly Mac OS X) systems from OS X 10.6 through macOS 10.14. The solutions are shown in the sections that follow. Yes, you can zoom in and zoom out your Mac screen. MacOS screen zooming FAQ: Is there a way I can zoom in and zoom out my Mac screen (iMac, MacBook, MacBook Pro, Mac Mini)?

Zoom desktop mac