Your images, show them small and click to obtain the zoom version .... 

Clicking ... The zoom effect goes very far. If you have very large images, the first click fills the screen.

When you click again, you get the picture at full size and you can navigate with the mouse on the image.


The module works only with an intermediate step, for example Blazy, Grid Tack, ...

You configure the display of the field.

For media switcher you choose Image to zooming.

It is a third party.

Blazy also. See the discussion of this module on this site ... 

Normally, you can easily integrate the zooming effect into the CKeditor. (However, there is a bug at the time of this writing)