While you are reading this, right now, press and hold Control on your keyboard and scroll the mouse wheel up or down.
Welcome to the Super Secret of Zoom control! No matter where you are or what you are looking at, the moment you feel your eyes squinting, just press Ctrl and Scroll the mouse wheel. So even if you can't find a Zoom button, this trick will work.
Another tip to zoom control, is to look at the bottom right corner of your Browser. There is "usually" a zoom button in the corner (depends on the browser you use).
Just click it - go ahead, right now - and your screen will zoom in. To zoom back out, you will have to click the arrow beside the button and choose "Zoom Out".
The keyboard shortcut to this trick is "Ctrl +" and "Ctrl -"
It's these little things that make our computer time so much easier to tolerate.
Zoom in Zoom out; Zoom image script; Zoom in online; Make text larger; Make text bigger.
I could go on and on... but I think you get the point. :)