Increase Font Size in Terminal for Mac OS X Quickly with Keystrokes
The default text size used by Terminal app in OS X can be quite small if you’re using a large resolution display. While you can change the font to be better suit your preferences, and increasing the line spacing helps reading too, another simple solution to boost readability is to simply increase the text size shown on screen while visiting the command line.
The simplest and quickest way to increase (or decrease) the text size shown for Terminal app is using keystrokes with the Command and Plus or Minus keys. This will adjust the size of the display font for the currently active terminal session, but it does not change the default font size for new terminal windows or sessions, making this more of a quick solution for when you need to increase readability.
Increase Terminal Text Size: Command+Plus
Decrease Terminal Text Size: Command+Minus
As Command+Plus increase the font size, Command+Minus will decrease it. Thus, if you want to go smaller for whatever reason, or you made the text size too big with the prior keystroke, hit Command+Minus (-) key to reduce it.
Return to Default Font Size: Command+0
If these command keyboard shortcuts sound familiar to you, it’s likely because you may have used them before for the same font size changes in browsers like Safari, Chrome, TextEdit, and many other apps. Much like the instant Preferences shortcut, this is not quite universal, but so many apps use the Command+ and Command- trick to adjust the visible fonts that it’s nearly universal for performing that function.
As we mentioned, this is a session based approach to adjusting terminal text size, which can make viewing command line details significantly easier to read. If you want to change the displayed text size permanently, you’d need to adjust the Font itself, which also offers precise controls for font size, font family, and font weight.
If you’re doing this to make the command line look a bit more attractive, keep in mind there are plenty of other ways to improve the appearance of Terminal app and make it more readable too.