Is there a way to zoom in/expand/enlarge part of my Mac's screen to fill the entire screen?
Basically, I'm looking for an app that allows you to select a part of the screen and that will then expand that part of the screen all the way to cover the full screen. So if I have a monitor that measures 1366×768 and I select a part of the screen that is 500X300 it will then enlarge that small part to cover the full available screen real estate.
Best Answer
You can use the built-in zoom feature to zoom in on a part of the screen on your Mac.
(Note: these instructions are adapted for El Capitan but also work with Sierra and as far back as Lion, though certain menus/buttons may be labeled differently).
Zoom
from the pane on the left.Use keyboard shortcuts to zoom
.Smooth images
(for better quality with images)Zoom follows the keyboard focus
.Zoom Style
; see the pictures below for help choosing.Zoom in
picture-in-picture
mode:Zoom in
fullscreen
mode:After turning on Zoom, you can control it with keyboard shortcuts, as mentioned by Paul Zagoridis:
Command+Option+8 toggles zoom on/off.
Command+Option+= zooms in.
Command+Option+- zooms out.
Source + more info: http://basics4mac.com/article.php/magnify
Reply below for any additional help or if you have questions; I hope this helps!