You can change the magnification of the screen. There are two ways to change it.
Step 1
You can change the display magnification by using the Zoom controller at the top right of the screen.
(Shortcut: +/ -)
Step 2
Double-click outside the box.
You can increase the display magnification to 100% with a single click.
(Shortcut: ⌘ + 0 )