Select Zoom from that is show left sidebar.
Now search on preferences screen and then click on it.Firstly you have to click on that is appearing at the top left corner of screen and then choose to.
This screen may be a little different on newer Mac OS X systems, but I’ve loaned my new MacBook Pro to a friend, and can’t look at it at the moment.If you want to applicable Zoom In and Out on Mac then it is bonus because your Macbook already has preexisted shortcut features for getting to access Zoom In and Out, but before it you must be enabled few settings then you are able to use those keys:
This preferences panel is shown in the following image: ”, and then you can select which key to use. In that panel there will be a setting that says, “Zoom using scroll wheel while holding. On Mac OS X 10.6.x, follow these steps to set this preference: Once you click the “Use scroll gesture with modifier keys to zoom,” you should find that the zoom-in, zoom-out feature works as I’ve described here. In the following image, the “1” indicates that the first step in the process is to search for “zoom,” and then the “2” shows the checkbox that needs to be clicked: On Mac OS X 10.9 (and possibly 10.7 and 10.8), I find it easiest to search for the word “zoom” inside of the System Preferences dialog, then go to the Accessibilities option that lets you click the checkbox that needs to be clicked. If this tip doesn't work for you by default, take a look at your System Preferences settings. Just hold down the key, then slide your finger to the top or bottom of the mouse, and you’ll zoom in and out just like you would with a mouse scrollwheel. I just bought an Apple Magic Mouse for use with my iMac, and you can use it to zoom in/out just like you can use a mouse with a scrollwheel. A lot of times I’ll find myself making text larger in Firefox by changing the font size ( + to make the font larger, - to make it smaller), but I prefer this Mac zoom-in/zoom-out approach. Again, hold down the key, but this time take two fingers and swipe upwards on the trackpad area to zoom in, then use your two fingers to swipe downwards to zoom out. 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” or “zoom out” your Mac screen. MacOS screen zoom FAQ: Is there a way I can zoom in and zoom out my Mac screen (iMac, MacBook, MacBook Pro)? Using an ad blocker? just a $2 donation at will help keep this site running