You can change the display resolution of your Mac to make text larger or gain more space. There are some predefined scaled resolutions available, but you can get more granular control over your display’s resolution.
Normally a Mac will run its display at the resolution Apple believes is best. There are also four or five different options—depending on your Mac and display and highlighted below—that provide different outcomes. They’re fine, but they’re options to make text bigger or your desktop larger without using the number-based resolutions we all understand. But if you do some digging, you can get some real control over your display by making actual resolutions available to you.
RELATED: How to Run Your Retina Display at its Native Resolution
Why is Display Resolution Important?
A display’s resolution is the number of pixels available both horizontally and vertically. A 4K display has a resolution of 3840 x 2160 pixels, or 3840 pixels horizontally, and 2160 pixels vertically.
How much information you can see on-screen at any given time is governed by its resolution. Higher resolutions mean that more things can be shown on-screen. Those things could be windows, icons, photos, or text in a document. Because of the larger resolution, however, that also means all on-screen elements are smaller, which is something else to consider.
Larger displays usually also have higher resolutions than smaller ones, especially if they are of good quality.
What Makes Retina, Retina?
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Source : How to Select an Exact Display Resolution on Your Mac
