This tip is an extension of one done last year. To control or modify the zooming function on a Mac, go to System Preferences==>Accessibility==>Zoom.
There are many different ways to zoom in on your screen, but one of the easiest ways to zoom is to hold the control key and scroll up or down (on the track pad or with a mouse). What should be noted is that your cursor position matters. Place your cursor to the location you want to zoom to before zooming in. When you zoom in, it will go to that spot.
Try it!
NOTE: This option only work on the projector when you Mirror Built-in Display, not with the Extend(ed) Desktop. Change this in System Preferences OR at the bottom of the AirPlay Display list (icon on the menu bar).
