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Go to System Preferences > Accessibility. Select Zoom in left side. Enable "Use Keyboard shortcuts to Zoom" option.
Now click Picture in Picture in Zoom Style.
To enable or disable Zoom, press Command, Option and 8 at same time.
To increase/decrease the size of Zoom, press Command, Option and + or -
Let me know how it goes
To take screen shot press Command, Shift and 3
To make a screenshot of a particular area of screen, press Command, Shift and 4. Select the area and the screenshot will be saved to desktop
In latest OS X, it opens rectangular box. It is not hard to turn off. Just press Command, Option and 8 to turn it off and pressing these keys will turn it on again.
While the zoom is on, pressing Command Option and + button will make the contents in that section bigger and pressing Command, Option and - will make it smaller. Make sure you enable "Use Keyboard shortcuts to Zoom" option in System Preferences > Accessibility > Zoom
I understand but the Zoom feature of OS X is a rectangular box. I looked for add ons for Chrome but couldn't find any. I will look again
I'm sorry I couldn't find any addon that does that. I've tried some, but many of them will work only for Pics only.
The Mac's zoom feature works well and can be turned on or off by pressing Command, Option and 8. Even though it is rectangle, it works well
I found this --> http://www.zoomitapp.com/zoom-it.html