You can use keyboard shortcuts to zoom your screen 'in or out' using;
Windows, Linux, Chrome OS and Mac:
For this "JRW Dubois" website try zooming in 4 or 5 times (max. 150%-170%)

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• Make everything larger:

  • Windows, Linux and Chrome OS: Press Ctrl and +.

  • Mac: Press Command ⌘ and +.
     

• Make everything smaller:

  • Windows, Linux and Chrome OS: Press Ctrl and -.

  • Mac: Press Command ⌘ and -.

 

• Reset to regular size or 100%

  • Windows, Linux and Chrome OS: Press Ctrl and number 0

  • Mac: Press Command ⌘ and number 0
     

• Use full-screen mode:

  • Windows and Linux: Press F11.

  • Mac: Press Command ⌘ + Ctrl + f.

  • Chrome OS: At the top of your keyboard, press the full screen key . This key is also called F4.